tag:blogger.com,1999:blog-75711992460967281022024-03-12T21:33:55.840-07:00Sound... unboxed !This blog is about 'liberating' reproduced sound from the confines of the speaker box.....an attempt to "taste open sound" with the minimum of trouble and expenseThe Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-7571199246096728102.post-27898691547165299682021-08-06T19:08:00.003-07:002021-08-06T19:11:35.093-07:00Important Note<p> Kindly note that the new series SOUNDS of MUSIC, a set of guidelines for the budding audiophile has been moved to:</p><p>https://sounds-of-music-guide.blogspot.com/</p><p>Kindly follow at the new url.</p><p>Reader questions and doubts will certainly be taken up on merit for further discussion and clarification in upcoming posts.</p><p>Happy reading!!</p>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-74057695450898973402021-08-06T10:11:00.001-07:002021-08-06T10:11:25.660-07:00<p> </p><h3 class="post-title entry-title" itemprop="name" style="font-family: Georgia, Utopia, "Palatino Linotype", Palatino, serif; font-size: 30px; font-stretch: normal; font-variant-east-asian: normal; font-variant-numeric: normal; font-weight: normal; line-height: normal; margin: 0px; position: relative;"><a href="https://diyxpress.blogspot.com/2021/08/sounds-of-music.html" style="color: #cc3300; text-decoration-line: none;">SOUNDS OF MUSIC</a></h3><div class="post-header" style="color: #997755; line-height: 1.6; margin: 0px 0px 1em;"><div class="post-header-line-1"></div></div><div class="post-body entry-content" id="post-body-7180509374823486165" itemprop="description articleBody" style="font-size: 14.49px; line-height: 1.5; position: relative; width: 518px;"><p><b>Guidelines for the Audio Adventurer</b></p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGIwTs4L9mC8R0RgIjvRAH9toCT-2NbQuNPRFTl6KNCV0i2t8antz7zHBTjLdY_3-RJGAPlvuTW_zBHx_azmiID7qGmTlTrl7srjSg33hryx1VaxOVPgWM70HDZi9iY6Brrh3G4aD_S1E/s2048/SM.jpg" imageanchor="1" style="clear: right; color: #cc3300; float: right; margin-bottom: 1em; margin-left: 1em; text-decoration-line: none;"><img border="0" data-original-height="2048" data-original-width="1536" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGIwTs4L9mC8R0RgIjvRAH9toCT-2NbQuNPRFTl6KNCV0i2t8antz7zHBTjLdY_3-RJGAPlvuTW_zBHx_azmiID7qGmTlTrl7srjSg33hryx1VaxOVPgWM70HDZi9iY6Brrh3G4aD_S1E/w150-h200/SM.jpg" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="150" /></a></div>These observations on the sounds of music reproduced in a home setup are mostly the result of years of foolish adventurism, waste of good money, and the realization (with the passage of years) that you need to be honest with yourself if you are to discover the sweetness of the fruits of your own labour. They may not be the best, but they satisfy a real need in an enjoyable manner. Which ought to be the basic idea propelling all our endeavours.<p></p><p><b>To Each Her/His Own</b></p><p>Except perhaps in the army, people rarely choose to "follow". So the attempt here will be to outline some basic points and highlight some warnings/cautions, and point to certain available options. For the enthusiast this ought to serve as a base from where to explore his/her own preferences and selections and also to make those choices in an intelligent manner, rather than in a haphazard manner.</p><p><b>Establishing the Base Lines</b></p><p>Before attempting to communicate effectively we must "fine tune" our language and agree on meanings. What do we mean by fidelity? Could fidelity be low... high ... or at an undefined "high end"? It is precisely this confusion and the carrot of perfection dangled before the enthusiast that have sustained the audio/hi-fi industry all these decades. Think about it, if there really was a "best" amplifier, a speaker matching that goodness, and recorded music sources on a par with that, ultimately nothing else would sell. And the world (at least the world of hi-fi!) would have been a better place. Sadly, that is not the reality.</p><p>My take on fidelity is simple. Don't go for complex definitions; but take every opportunity (not very easy in these tech-driven times) to listen to music... LIVE music... singers, male and female, acoustic instruments being played, small groups jamming together with nothing more than say a tabla, guitar, flute, violin or a harmonium etc. Soon you will learn to identify the "signatures" of most of the singers and the instruments. </p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNDl8hdCtM2FjSET3jcNdSAzt4Oyxq_YCwX2w-7VYGHv8yklWcmsHRhKLd_tOZxrDkLEFG2udeKdDhxbnA58xM30ywre6Xx4bL5VFFzFbmGdpHLbOcFlvp99IOW6MzYiUK6uuF9tm9opk/s2048/music.JPG" imageanchor="1" style="clear: right; color: #cc3300; float: right; margin-bottom: 1em; margin-left: 1em; text-decoration-line: none;"><img border="0" data-original-height="1666" data-original-width="2048" height="163" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNDl8hdCtM2FjSET3jcNdSAzt4Oyxq_YCwX2w-7VYGHv8yklWcmsHRhKLd_tOZxrDkLEFG2udeKdDhxbnA58xM30ywre6Xx4bL5VFFzFbmGdpHLbOcFlvp99IOW6MzYiUK6uuF9tm9opk/w200-h163/music.JPG" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="200" /></a></div><br />You should be even able to recognize the difference in the sounds of two different tablas--played by the same person, or otherwise. This, in my humble opinion, is the first step to understanding what fidelity is. Not much point in learning by heart phrases like frequency response (can you define that correctly?), transient response, total harmonic distortion ... and such stuff. Do all that later when you are able to use them as tools to better your approach.<p></p><p><b>Tools of the Trade</b></p><p>The first set of tools for the audiophile come totally free: a fantastic pair of stereophonic transducers, and an amazingly high powered data processing system. Every one of you is the proud owner of a pair of ears and a brain. But they are not perfect, in that they cannot "capture" or record an acoustic event for later reproduction and enjoyment. Too bad.</p><p>However, today the enthusiast is lucky to have comparatively inexpensive digital stereophonic sound recorders. For somebody planning to spend at least 25k on a basic music system to begin with, investing say around 10k</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5xRUz8UKaDqEKslwiCp1fZVGa324Ers7B9uNC911NV6-xnoJk6OYOjrH9jsJDTVwrcaYUKSHts-_qd9v3wGo_oEAX5DAQXjXvurMfjwtLMHo5ZEHXHobvGkeTBXIcT1lBlbGAv_XuUoI/s1016/digicorder.JPG" imageanchor="1" style="clear: left; color: #cc3300; float: left; margin-bottom: 1em; margin-right: 1em; text-decoration-line: none;"><img border="0" data-original-height="1016" data-original-width="684" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5xRUz8UKaDqEKslwiCp1fZVGa324Ers7B9uNC911NV6-xnoJk6OYOjrH9jsJDTVwrcaYUKSHts-_qd9v3wGo_oEAX5DAQXjXvurMfjwtLMHo5ZEHXHobvGkeTBXIcT1lBlbGAv_XuUoI/w134-h200/digicorder.JPG" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="134" /></a></div>in a good digital recorder as a tool to perfect the system is a bargain, I think. Of course, the important thing is to have at hand a good recorder (begged or borrowed, not stolen!) so that your live acoustic experiences could be "captured". These "records" will serve as your touchstones for judging the system that you are putting together.<p></p><p><b>One, Two, Four, Eight ?</b></p><p>If one is good, two can surely be better. So goes our logic. So four could no doubt</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisq2wsx4rObOEPDzL9STvD_yyv15Ft4qYfxghBLPeKt7mhkM6w9Fvp6o7XJ0V9UoQo2b3rfLdfWWnfxobxG38FJ79lVw1z2r1Wb7PZcJfui9mtTjo5_QimDmO8YOMIxHTVaa2XEMz88gU/s860/stereo.png" imageanchor="1" style="clear: right; color: #cc3300; float: right; margin-bottom: 1em; margin-left: 1em; text-decoration-line: none;"><img border="0" data-original-height="556" data-original-width="860" height="129" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisq2wsx4rObOEPDzL9STvD_yyv15Ft4qYfxghBLPeKt7mhkM6w9Fvp6o7XJ0V9UoQo2b3rfLdfWWnfxobxG38FJ79lVw1z2r1Wb7PZcJfui9mtTjo5_QimDmO8YOMIxHTVaa2XEMz88gU/w200-h129/stereo.png" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="200" /></a></div>upstage two. And eight..! Oh, my such was the channel wars that companies went through in the previous century. We started with sweet old Mono, graduated to Stereo. And then came Quadrophony for those with more (four times!) money! Today mostly it is eight channel home theatre equipment (7 + 1channels, no less) that blasts our poor ears and brains.<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdPulLQ2lwS-9pgKxpdDbTlE0gEufow8ESoxXqpoY9Jy1XHFOkbOb0UdOEOQfUPHxbBF3d3dAjBvmwtEcF0FdnJzQFVIK-V23ZzX5EcNEKaZiYvjvu-SOQ-Gp4rHvliYX4JuWM1Ee-L1w/s2048/HT8.JPG" imageanchor="1" style="clear: right; color: #cc3300; float: right; margin-bottom: 1em; margin-left: 1em; text-decoration-line: none;"><img border="0" data-original-height="1279" data-original-width="2048" height="125" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdPulLQ2lwS-9pgKxpdDbTlE0gEufow8ESoxXqpoY9Jy1XHFOkbOb0UdOEOQfUPHxbBF3d3dAjBvmwtEcF0FdnJzQFVIK-V23ZzX5EcNEKaZiYvjvu-SOQ-Gp4rHvliYX4JuWM1Ee-L1w/w200-h125/HT8.JPG" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="200" /></a></div>The more the merrier! But the big question is: does the system "speak the truth" ?<br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUj3y3wjam0AMoBynw2sz4Gumn6w2YvlV3_m0Ie6YRkZe6Ln53Asntv1N9kh4rfv9zS5fVYJDZL37l9SQM6padM6lNOq2r0zvHiQ5yenrWTrQosU8_oKrtm57f4mS9Z5BQdC8Vbj546ZE/s1427/quadraphony.JPG" imageanchor="1" style="clear: left; color: #cc3300; float: left; margin-bottom: 1em; margin-right: 1em; text-decoration-line: none;"><img border="0" data-original-height="1427" data-original-width="1019" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUj3y3wjam0AMoBynw2sz4Gumn6w2YvlV3_m0Ie6YRkZe6Ln53Asntv1N9kh4rfv9zS5fVYJDZL37l9SQM6padM6lNOq2r0zvHiQ5yenrWTrQosU8_oKrtm57f4mS9Z5BQdC8Vbj546ZE/w143-h200/quadraphony.JPG" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="143" /></a></div>Look at a simple question. Do we have a mono tabla... a stereo tabla? ... a mono piano? ..violin...guitar?? Right from the small hand-held ganjira to the huge drum set, and all the other instruments that man had invented over the years, produce sounds and tones of one sort or other. For arguments sake, let us say it is easier to "capture" a simple instrument with "fidelity" or "truth" or realism. Get hold of a friend who plays the ganjira, record him/her; record somebody strumming a guitar, playing a violin...<p>At home play it over a single speaker and amp and see what you get. Examine how closely you can get to the "original" sound. As lesson two, use two channels for playback (thank God most digi recorders are stereo) and do some critical listening vis-a-vis realism. Mostly two channels are likely to give you a better experience --under some well-defined conditions. Great!</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnMgv6WzmrxB2LBfZVLOI4RIGcwpr1zEoAv9KpSi7bJ-ZrJZHFpeH6QgVsJKcdjwsz3aJzY4DU_hZo9gxqvZ5-5CIG3SJZ9pkjnO_tNCQ-BWph_AFCbn9JyhUH9OSprFO3F9HaeQnu0rc/s184/distil-1.JPG" imageanchor="1" style="clear: right; color: #cc3300; float: right; margin-bottom: 1em; margin-left: 1em; text-decoration-line: none;"><img border="0" data-original-height="184" data-original-width="94" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnMgv6WzmrxB2LBfZVLOI4RIGcwpr1zEoAv9KpSi7bJ-ZrJZHFpeH6QgVsJKcdjwsz3aJzY4DU_hZo9gxqvZ5-5CIG3SJZ9pkjnO_tNCQ-BWph_AFCbn9JyhUH9OSprFO3F9HaeQnu0rc/w102-h200/distil-1.JPG" style="background: rgb(255, 255, 255); border: none; box-shadow: rgba(0, 0, 0, 0.5) 1px 1px 5px; padding: 8px; position: relative;" width="102" /></a></div><p><b>Distilling Good Sound</b></p><p>Now begins the art and craft of "distilling" the recordings and extracting realism from your "canned" acoustic events.</p><p>* * * * * </p><div><br style="background-color: #66bb33; color: #333333; font-family: Georgia, Utopia, "Palatino Linotype", Palatino, serif; font-size: 14.49px;" /></div></div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-71634743733081977832012-02-12T01:42:00.000-08:002012-02-12T08:08:00.360-08:00HEAR AND THERE ...<b>Reality and the Senses</b><br />
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<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrvgWUDBmGvOIPh3SbzPo5v2CIf6YCgzMM0vU7mXlzeg9FIA74o_DNSfua4f0qoundVAkRppLvgoZLI_BXAi8chmTKMA_8aMtohT9Sn9v-7qAnLBNoUuHcUNW5kz3grXQg7WKQYKyZ_OA/s1600/pinna2.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="200" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrvgWUDBmGvOIPh3SbzPo5v2CIf6YCgzMM0vU7mXlzeg9FIA74o_DNSfua4f0qoundVAkRppLvgoZLI_BXAi8chmTKMA_8aMtohT9Sn9v-7qAnLBNoUuHcUNW5kz3grXQg7WKQYKyZ_OA/s200/pinna2.gif" width="151" /></a></div><b><br />
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It is no accident that man perceives the 'reality' of this world through his senses, or rather through the manner in which it is interpreted by his senses. Prime among the senses are vision and hearing. No doubt, the requirements of evolutionary survival and mastery of his environment subsequently have fine-honed these sensory faculties and endowed them with capabilities that at times defy fuller comprehension, or at any rate invite our wonder and disbelief.<br />
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The visual system --the eyes and the brain-- is a devilishly fast and accurate 3-D signal processor that has the added merits of a built-in peripheral vision sub-system that is tuned to simultaneously sense even the faintest of movements in the lowest of light. No system man has devised has approached the complexity and perfection of our visual system. Period.<br />
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It is not difficult to surmise that the sense of hearing too is likely to have evolved to a fine degree of complexity and sophistication (so far as input signal processing and interpretation is concerned) once we could see that hearing has been more than a capable partner to vision in ensuring the evolutionary march forward of man in a difficult and dangerous environment. I have commented on the basic aspects of the topic in my earlier posts here. The acuity and accuracy of the ear-brain combo, an accepted fact that has very many proofs in everyday situations even at the present time when man's survival has come to depend less and less on his senses, have also been demonstrated by many researchers in the field.<br />
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While considering the aspect of 'reproduced reality' as an exercise in the re-creation of the original scene in both its visual and auditory aspects brings up another interesting side-comment. Ever since the first day of the demonstration of moving pictures, man has been dreaming of 'canning' events that pass into the oblivion of the past. Over the past decades, success in that attempt has taken huge strides forward. Perhaps one of the most immersive of such 'realistic' experiences is the IMAX movie system. We have at present a plethora of systems that claim to reproduce 3-D visual reality and a truly immersive visual experience. But the question is, do we really take that re-creation of reality as the real thing itself? Or, in other words, are the eyes truly and fully 'deceived' into accepting it as reality? Hardly. I am not forgetting the degree of realism that is provided by many audio-visual simulation system powered by heaps of computing power. But the honest answer is, though they come close, sometimes wonderfully close, to the 'real thing', nothing like a full-scale 'deception' is staged. That being the state of affairs, won't it be prudent to aim for and accept a similar situation in the auditory field too ?<br />
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<b>Raising the 'Fi'</b><br />
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Ever since the invention of that tinfoil contraption that wheezed out a passable imitation of "Mary had a little lamb...", man has been trying his best to 'can' acoustic events with all its aspects of reality intact. To the contemporaries of Edison, his phonograph was 'life-like' and that was a sure-fire jaw-dropper. It is interesting to watch how every development, every bit of improvement was hailed as another notch up in 'fidelity'. In the electrical/electronic era, the definitive term was 'hi-fi', which has stuck with us till the present and it looks like it is not going away anytime soon. However, the 'height' 'fidelity' has achieved till date is somewhat questionable, though its aims were honourable!<br />
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Fidelity is a simple word that could mean "..the exactness of the copy to the original..", and in the case of the re-creation of an acoustic event, the triggering of the feeling/s that one is at the original venue. One moment you are in your living room, and the next, perhaps in the front row of a concert hall... or in the immersive rhythmic din of the live rock concert ... or in the intimate company of jazz musicians in a club ... you ARE there!<br />
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Over the ten decades that made up the last century, it was one thing or the other which the audio questor energetically hunted after in his search for 'nirvana' in audio --a 'full' frequency response that surpassed the limits of audibility, the absence of noise and distortions of all shades and types, virtually unlimited power on tap, and along with that tremendous slew rates in amplifier specs, a whole lot of 'classes' of amplification, vacuum tubes, bipolar transistors, MOSFETs and other exotica...a mind-boggling variety of speaker designs ... each with its promise of the Holy Grail of a perfectly realistic reproduction. The 20th C saw wonderful advances in Digital Signal Processing and it seemed the possibilities now were truly endless, and everybody thought digital was going to be what finally delivered the elusive Grail to man thirsting for true fidelity in reproduction.<br />
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The task of recording and reproducing the simplest of acoustic events with a virtually foolproof "deception coefficient" has, however, eluded the technical wizards of our era. Period. I am not forgetting the astonishing level of verisimilitude that some systems have been able to project, but one has to be reminded that there were a lot of 'conditions' for that to happen. To achieve even a modicum of 'reality' with possibly the 'best' conventional stereo reproduction system, you had to sit in the 'sweet spot', rigid as a dummy, with hair parted in the middle... and even then, wonder of all wonders, NOTHING that you could throw at it really deceived the ears to any degree, except trigger occasional bouts of fleeting illusion at best.<br />
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<b>The Natural Way</b><br />
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The jury is still out on the debate whether it is good or bad that Henry Ford did not imitate Nature, or its corollary, if it was good or bad Nature did not imitate Henry Ford. So far as we know, Mr Ford is the papa of assembly-line mass production. It is educative to think why Nature, with her requirements of producing the millions of clones of just two different models, did not opt for a convenient and efficient conveyor belt system. We then would have had no duds or non-conformists in this world! Sadly that was not how She chose to work, and therein lies a clue to her methods.<br />
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A little 'side-step' at this moment brings us to some interesting questions, and not many answers. Man, with his logical and scientific mind, launches into 'production' of what s/he wishes to make once the prototype has been perfected, and the tolerances set. Quite the thing to do if you want to have predictable results and repeatability. Or so we think. I had occasion to be with two friends as they signed on the dotted lines and became the proud owners of the same model of cars with near enough chassis numbers. Naturally they were 'identical' copies in every conceivable way. But sadly, they 'drove' differently. Ditto experience with another set of audiophile acquaintances. The guy had just one listen to an amp-speaker combination at his friend's place, and fell in love with the 'sweetness' of the system, (True, something more or less similar happens in the case of falling in love/getting married too! ...why do they call it "falling" in love...??? ) and promptly ordered an 'identical' set from the dealer. But then big disappointment upon audition at home. He then carted the whole system to the friend's place for a side-by-side comparison with the 'original', and discovered that though the situation was a lot better, still '"something was missing". In the case of amplifiers and speakers, such behaviour brought on by manufacturing 'spreads', though still within 'tolerance', is not totally unknown to many.<br />
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That perhaps ought to remind us that aren't we lucky that Nature (and/or God...) chose to eschew the assembly line concept and instead opted for the more fuzzy methodology. Had she gone the way of Papa Ford and most others in 'assembly-line production', we would have ultimately ended up with millions of 'models' with wide tolerances in hearing, but still "within specs" when it came to (let us keep things simple, and for the moment forget about the other faculties) hearing accuracy. The result would be some of us out on a hunt won't be home for that late evening session around the campfire, thanks chiefly to our 'spec-accurate' ears had told us that a faint threatening growl was coming not from right behind you, but from somewhere far behind and off to one side... and again, the chorus of the crickets was particularly loud that evening!!<br />
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The auditory system, though it has come into much disuse as a result of man's metro-morphosis these days, has a record of astounding accuracy in imaging. These faculties were no doubt developed and fine-honed over the millennia of evolution and survival. A corpus of scientific research work exists that has tried to study and understand the finer aspects of hearing. It is easy enough to come to the conclusion that there are primarily three overlapping mechanisms of hearing that contribute to accuracy of imaging and 'realism'. The first, applicable over the low octaves, relies on Inter-aural Time/phase Differences (ITD) to clue the brain as regards the direction of sources of sound. In the next few octaves at the low-to-mid level, the Inter-aural Level/intensity Differences (ILD) rule the roost. But when you get into the higher octaves above the mid frequencies, a complex 'filtering' done by the external ear or pinna, interprets the directional clues to the max. Our interest in stereophony has resulted in voluminous studies as regards ITD and ILD. But despite many revealing studies, the pinna and its supreme contribution to the mechanism of hearing seems to be largely not given the attention it surely merits.<br />
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The evolutionary needs of hearing/directional accuracy has resulted in a unique 'natural' approach to the mechanism of directional analysis. This aspect assumes extraordinary importance when you consider the fact that there is no 'standard' human being, or for that matter, no 'standard' ear too. For a complex living being that assumes its ultimate shape and functionality after a mind-boggling set of millions and millions of cell divisions after the seminal fusion of just a couple of cells, it is not surprising that the human system is not a 'Xerox-copy' of a master blueprint. Rather, it is a highly unique and individualistic system built according to some master specs. As we all know, the fingers and eyes of the human being carry unique individual patterns (<a href="http://en.wikipedia.org/wiki/Fingerprint">http://en.wikipedia.org/wiki/Fingerprint</a>). Nobody has found an identical set of fingerprints from two different humans--yet. And again, the unique retinal patterns (<a href="http://en.wikipedia.org/wiki/Retinal_scan">http://en.wikipedia.org/wiki/Retinal_scan</a>) are accepted as identifying markers. When it comes to the ear, the individual ridges and convolutions, the size and shape, the channels and protruberances of the external ear, or the pinna again, have no 'equals'. It would be interesting to take photographs of your own left and right pinnae and study them side-by-side, and be astounded to discover subtle differences--they are NOT cast in 'standard' moulds. Yet, in spite of these marked and 'serious' variations, the individual's sense of aural accuracy remains astoundingly 'standard'.<br />
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<b>The Secret of Hearing</b><br />
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Looking into the 'secret' of hearing accuracy leads one to certain conclusions. Nature in its infinite wisdom has, instead of relying on 'standardized' solutions, has taken recourse to the ploy of embedding these individual 'filter characteristics' within the brain after a long period of 'training'. No doubt the shape and patterns of the external ear or pinna changes subtly over the years as the individual grows up. But one "wears the same set of ears" from one's birth till the end of the journey, and as we live within an ocean of auditory events, it would be an easy matter for 'training' the ear/brain combo, with visual verification/confirmation of the direction and distance of sound clues. In a short while the individual masters the complex filtering of his pinnae, and as a result, is able to interpret the directional clues based on the 'pinna transforms'.<br />
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Studies conducted about the nature of pinna transforms (Moller, Hofman, Van Opstal and others) and its abilty to accurately interpret front/back, up/down etc clues have confirmed these observations. Modification of the pinna's physical contours and repeating the studies have confirmed that the ear/brain combo is able to 're-learn and adapt' to the new/modified filter characteristics after a short while, and as a result, the ability of the volunteer subjects to accurately interpret directional clues, which had plummetted initially post-modification, came back to 'normal' levels.<br />
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<b>The Individual Pinna Signature</b><br />
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However, the one aspect as regards pinna transforms that has not yet got established in current theory and practice is that the pinna IS the "decisive factor" in hearing and our perception of realism, however you might define that. This is particularly so when considering the recording and reproduction of acoustic events. It is common knowledge that a surface understanding of the functions of the pinna has launched investigations into ways of "tricking" the ears into believing that "you are there" at the original venue of the recorded acoustic event. These technical legerdemains have to a great extent been successful also, though to differing degrees. But whatever "sleight of hand" one might do, it remains a fact that the ears will ALWAYS detect that a reproduction is not the real thing, unless and until you factor in the pinna and its individulized filtering into the final equation. This is so because the brain looks for the individual's own 'pinna signature' in the signal/s being fed in and analysed, and when it cannot detect any trace of that, it concludes that the signals being heard are not "heard properly", and as a result they are NOT real!<br />
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<b>The 'Atma of Hearing'</b><br />
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The ability of the ear/brain to detect vague 'copies' as not being originals is a foolproof method. However, while researching ways to re-create reality, we often ignore the absolutely unique and individual nature of the pinna transforms and its key position in the hearing mechanism, which can only lead us astray. This is where I would like to introduce what I call the 'Atma of Hearing' concept. My contention is that only when we succeed in "splicing in" the individual 'atma of hearing' signature into a recorded event, will our ear/brain accept as 'real' a reproduced acoustic event, because then only will we appear to be "hearing" that acoustic event " with our own pinnae" and not with "another's ears".<br />
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The Indian Vedic philosophy proclaims 'Ayam Atma Brahma' --"This soul is God".The Atma (the soul) or Atman, which is but a miniscule fraction of God's Divine Spirit, is central to the individual existence. And it is UNIQUE. Atma also means the 'essence', here the essence of human individuality. One is able to understand the concept when one considers the jaw-dropping complexity of the human body and its systems, and also reminds oneself of the fact that without the 'essence' or 'atma', it is nothing but a collection of dead, lifeless tissue.<br />
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In the mechanism of hearing also, the "soul of hearing" is nothing but the individual pinna transforms, without which everything loses its 'natural' purity and realism. Like the individual soul, the 'atma' of hearing too is an absolutely unique 'essence' that 'lives' within the brain of the individual as a result of the life-long integration of that signature into everything that the individual hears. Anything that bypasses this "signature filter" is interpreted as being not REAL.<br />
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So perhaps it is time we re-channelled our largely misdirected energies questing after the various artefacts of hearing like frequency response, distorion elements, and such like stuff (not that they are worthless; but rather, they do not form the core, and so merit only secondary attention) into a whole new avenue, that could in all likelihood lead us nearer to the Holy Grail of hearing. Our efforts will be crowned with success if we are ready to accept the fact that within each individual there reposes a unique 'Atma of hearing', and the integration of that into the chain of reproduction holds the key to the re-creation of reality from an auditory perspective.<br />
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More than ever, the concept is perhaps closer to realization in the digital age as we now have advanced tools like DSP that in all likelihood will be able to reward our efforts to "measure and codify" the individual 'atma' signature and "splice that in real time" into the digital data that represents the three dimensional sound field captured at the original venue. This then will be the one sure way to transport the listener 'there', as s/he will be once again "hearing it all with her/his own beloved pinnae".<br />
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How to achieve that should occupy us in the days to come if we are serious about 'reproduced reality'.<br />
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* * * * * * * * * * * *The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com1tag:blogger.com,1999:blog-7571199246096728102.post-52407521628440256872012-01-28T06:31:00.000-08:002012-01-28T06:54:45.845-08:00SOUND REMINDERS<span class="Apple-tab-span" style="white-space: pre;"> </span>A degree of simplification is often the key to grasping a concept. It is perhaps a lot like the argument about learning to swim. Swimming, experts will tell you, is the art of learning and mastering the many strokes. But the knowledgeable will also add that the first step is to learn to be comfortable in the water and then learn to float. Jumping in at the deep end and launching into the standard beginner's stroke is likely to earn you a stomach-ful of water and a holy terror of swimming.<br />
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Audio is at best tricky waters, and learning to maintain your balance in a strange new medium is the key to expertise and enjoyment of the many delights of sound reproduction. May I urge the 'pundits' to close their eyes, with an indulgent smile on their faces, as the newbies are invited to a frolic in the shallows of audio in the following discussion.<br />
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<tr><td class="tr-caption" style="text-align: center;">Sound propagation -- just 're-imagine' the concentric circles as concentric spherical waves in 3-D space</td></tr>
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Anybody who, as a child, had thrown a stone into the still waters of a pond knows how sound travels in the air in ripples or wavelets. (If you haven't yet done that, it is time you hurried to do that experiment!) On a rainy day, the many raindrops that cause a series of ripples on the surface of the water demonstrates the interaction of the wavelets. If you have disturbed the surface of water in a large container, then you are sure to have seen the reflection of the wavelets from the edges of the container, and a complex interaction with the original wave. It is a fascinating sight.<br />
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Now perhaps the first reminder for the sound enthusiast is that sound is not confined to the two dimensions of the surface of water or that of a sheet of paper on which the wavelets could be drawn. From the source it spreads all around in the three dimensional space in a spherical pattern. Imagine soap bubbles, one within the other, expanding as they are blown, when you think of the expanding wavelets of sound around the source. The main thing here is to imagine that this is what happens when a bird tweets, when somebody speaks/sings, when a musical instrument is played, when a cracker is burst etc.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj757OpNP7aObgLll2GNobzIFxl1fbd7RMzc2wwSel97tjc_XWYytlz4OEoLUlI6-QQeUDR6pBR6TFckaMQL0sqbYNcBI1LTWpnafCOJ-zTeYaYYs5UPD0Q5SKp1nYzPIFCHAuG_jncHxM/s1600/spherical+propagation.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="314" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj757OpNP7aObgLll2GNobzIFxl1fbd7RMzc2wwSel97tjc_XWYytlz4OEoLUlI6-QQeUDR6pBR6TFckaMQL0sqbYNcBI1LTWpnafCOJ-zTeYaYYs5UPD0Q5SKp1nYzPIFCHAuG_jncHxM/s320/spherical+propagation.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">( the loudspeaker here is idealized as a source )</td></tr>
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This spherical spreading out of the wavelets of sound occurs because most often the source of the sound has smaller dimensions than the wavelengths it produces. However, in a real room or hall, the propagation is more hemi-spherical as is illustrated with this idealized speaker output. (Idealized because in real life speakers do 'beam' a lot, and do not always launch the sound equally well around them.)<br />
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<tr><td class="tr-caption" style="text-align: center;">(idealized source)</td></tr>
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Even a grand piano, when played can be heard with equal fidelity from any angle around it, though musicians tell us that concert pianos are meant to be played with the 'lid' up and the audience facing the reflecting lid. However, inside a room or a hall, the immediate reflections also contribute to the feeling of hearing it 'fully' from any angle.<br />
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The second reminder for the audio enthusiast, and especially the one who is more interested in the reproduction of 'canned' (recorded) acoustic events, is the fact that reflections are many even in a large auditorium, to speak nothing of the average living room. It is lucky that we do not get confused in the midst of a medley of reflections, thanks to the ear-brain combo 'processing engine'. A sobering demonstration would be to push your finger into one of the ears while listening, and immediately the 'clarity' of the sound image collapses into a confusing and irritating mayhem. Now be careful to not jump to the conclusion that this is the magic of having two ears and so stereo (stereophonic sound reproduction) is the answer to all the ills of perception. Sadly it is not, and it is a complex issue that has not been fully tackled. Just understand that reflections are a part of the real auditory scene as we know the sound wavelets propagate all around the source; the question is what are the 'needed' reflections and what are the unwanted reflections, and do we have any control over them while recording and reproducing acoustical events. Your understanding will grow as you progress with many aspects of the audio art.<br />
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The third set of reminders have got to do with frequency, tone and timbre and perceived realism. Though elephants are known to communicate over vast distances using sub-sonic frequecies, the human range of hearing, by common consent of experts, is limited within 20 Hz to 20,000 Hz. The unit is the Hertz and it is one cycle per second, and a cycle is a comlete vibration from the rest position to and fro, initiating a compression and rarefaction of the medium (air, in the case of speakers, which are easier to understand). Here are representations of a tuning fork vibrating to create the compressions and rarefactions of the spreading sound waves.<br />
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<tr><td class="tr-caption" style="text-align: center;">Tuning forks and sound wave representations</td></tr>
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When a speaker cone reproduces say, 50 Hz, it is vibrating back and forth fifty times a second. It will be educative viewing the cone in the light of a neon lamp or a fluorescent light with some flicker and varying the frequency up and down a bit. Often say, when reproducing a drumbeat, when the loudspeaker cone jumps out at the first transient, many think that this is what produces the 'thump'. Yes and no. The jumping forward of the cone creates the high amplitude sound wave, but the frequency and character of the sound per se is created by the vibration of the cone which is not visible to the eye. Remember. movies 'move' because of persistence of vision, and anything more than 10 Hz (no, not the sound, but the movement of the speaker cone!) is difficult to see.<br />
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<tr><td class="tr-caption" style="text-align: center;">Frequency and wavelength relation</td></tr>
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Now speaking of the frequency range of human hearing, don't be in a hurry to swallow all that about 20-20,000 in a simplistic manner, and try to listen for the extremes of the range. Extreme low frequencies may be aplenty in the home theatre stuff, but they are very rare in real life, except perhaps when there is a thunderstorm or when you are near a huge waterfall or when the sea is stormy-or maybe near a fireworks display! As for the high frequencies, they are again only the modicum of 'garnishing' that gives character to the real world sounds. An extreme dose of HF, as is put out by a modern loudspeaker driven by an amplifier with crazily set tone controls, playing an 'unnaturally recorded' track, easily brings on listening fatigue and ear damage in a short while. So much to discourage you from joining the 'tish-boom' brigade. The key here, as it is always in audio reproduction, is to try and get as close to 'natural' as possible.<br />
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It is time for us to familiarize ourselves with the frequencies--and how they sound. The Web has today given the layman many advances tools and facilities to advance the knowledge of his hobby. Here is one of the many links ( <a href="http://homerecording.about.com/od/homestudiobasics/a/test_tones.htm">http://homerecording.about.com/od/homestudiobasics/a/test_tones.htm</a> ) that lets you download free samples of audio files at various frequencies; download and play them in the computer itself or write them onto a CD, and remember NOT to convert them into low-fi .mp3 files, but to preserve them in the original .wav format itself. It would really "open your ears" as you start listening and discovering many new things for yourself. For example, how difficult it is for you to hear very much above 10,000 Hz as you become older. So take all that you read about with a large pinch of salt and listen and learn for yourself. Remember not to drive the amplifier and speakers with high volume levels of extreme low and high frequencies as it is not good for their health and also for that of your ears. Also remember though you might think yourself to be familiar with the various frequencies, it is not easy to 'remember' them and compare them with the component frequencies of real life sounds--it would take years of practice to have a discerning ear like a trained musician. You might often have seen and heard musicians using pitch pipes and sometimes tuning forks while tuning their instruments. But it is not practically possible to hear even one pure note in isolation in natural sounds.<br />
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Take a look at the frequency distribution of the various musical instruments and the human voice, the male and the female.<br />
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<tr><td class="tr-caption" style="text-align: center;">The audible sound range</td></tr>
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The pipe organ, the King of instruments or the Master instrument, covers the full range of audibility (please also note that the larger organs can go way below 20 Hz!), while the concert piano comes a close second. The male and female voices have a very limited range. Researchers of the early 20th C, while studying telephone circuits have concluded that in order to have intellible communication, the frequency range needed is even smaller. The sounds that you encounter in Nature too have a somewhat limited range. Today, after considering many factors, one could say that a reasonable degree of fidelity could be had within the range of say 60 Hz to about 15,000 or 16,000 Hz. Fidelity, as you will soon discover, depends not on frequency response alone.<br />
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<tr><td class="tr-caption" style="text-align: center;">A sample frequency response curve</td></tr>
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That brings us to frequency response, a term bandied about by audio enthusiasts. Is it just the range of frequencies that your amplifier or tape recorder or CD player or speaker is capable of handling? Hardly. To give it its full name, it is actually frequency/amplitude response. And when you say that your amplifier has a flat frequency response, what you mean is that it is capable of handling the specified range of frequencies without altering the relative levels of the frequencies. Suppose it is fed a signal with a freq at 200 Hz of an arbitrary level, along with another at 2,000 Hz half as loud, and also a third at 8,000 Hz with say one-fourth the level of the first, though the amplifier might be called on to raise the overall levels to drive a speaker, the relative levels of the three signal would remain the same, provided the amplifier has a flat response. In other words, an amplifier or other audio component, should preserve the loudness relationships between various instruments and voices in the input signal and should not over- or under-emphasize any frequency or tone. This then is known as flat frequency response.<br />
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But then, remember, there is no ideal amplifier capable of doing such a precise job and amplifiers are usually rated to have a "flat frequency response" within say plus and minus a small figure, usually expressed in Decibels (dB). Decibels indicate ratios of voltages and powers, and it is not easy for the layman to have a non-math understanding of unit. The reader is sure to be familiar with units like the Volt, Ohm, Ampere, Tesla etc (each honouring a great scientist), and the Bel is a unit of measurement that honours Alexander Graham Bell. It is a large unit and one-tenth of that is the decibel, called a "deebee" and written as dB. You are likely to find the dB a lot in the specifications of audio equipment and it is easy to remember a few things about the dB.<br />
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The sensation of loudness is detected as a logarithmic function of the sound pressure levels at our ears, and the dB scale indicated that easily. A difference of 1 dB is taken as a minimum change in volume/loudness detectable by ear, while 3 dB is a moderate change. A difference of 10 dB means a doubling of volume or loudness. By convention, 0 db is the threshold of hearing. Other examples inlcude a soft whisper at about 15-25 dB, general background noise at about 35 dB, noise levels inside a home or office is around 40-60 dB, a normal speaking voice goes up to 65-70 dB. The climax of a Western orchetra is known to reach about 105 dB, while rock band easily top 120 dB. There is the onset of pain and loss of hearing from them onwards, and jet aircraft are known to be as loud as 140-180 dB, with an "unhealthy mix" of frequencies at the upper and lower registers. And while on the topic of loudness levels, a good reminder is that a 4 W amplifier can easily sound twice as loud as a 2 W one, other things being equal, while it would take a 100 W amplifier to sound twice as loud as a 10 W one, and as you move up the ratio of loudness, the figures soon become ridiculous and dangerous to your ears!<br />
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The average "hi-fi" amplifier claims to have a frequency response that is flat to within plus/minus 3 dB. That is, with possible wild variations, a possible change of 6 dB and it is not a moderate amount by any measure. To understand why this kind of imprecise response could play havoc with fidelity, one has to take a look at real world sounds. The natural world presents us with hardly any pure tones. Every natural 'tone' is a mix of a basic frequency, and its 'overtones' that are multiples of the base frequency. Take the same musical note coming from two different violins or from the mouths of two trained singers able to precisely vocalize the same musical note, your analysis will tell you that the ratio of the overtones and their nature will be slightly different. This is what gives 'character' or 'timbre' to the sound in real life. Musicians can easily distinguish the sound of many particular similar instruments as their ears are trained to recognize the subtleties of the timbral differences relating to the overtones and their levels and ratios. Please note that timbre is defined as the 'quality' of a sound that distinguishes it from other sounds of the same pitch and volume.<br />
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Imagine an amplifier that has a wildly fluctuating frequency response curve (very common in the real world!), though it is still within the +/- 3 dB range in its specification, and so qualifies as a moderately good hi-fi instrument. When this amp is fed with a real life sound, there is every chance that, if the vagaries of response are in the critical middle frequencies (approx: 2 kHz to 5 kHz) particularly where the ear is most sensitive, the output that emerges from it will have altered the timbral quality; that is to say, the relative levels of the overtones are altered, and the signal sounds like "something else"-- and fidelity is lost. To sum up, it is not the 'correct' specifications that can hide the 'truth' very much that matter, but rather, measurements that will certify that an amp has an over-all smoothness of FR that is more important from the angle of fidelity. A timely reminder here is that the same criteria could be applied to every component in the audio chain.<br />
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</div><div>[ More to follow ]</div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-70417979288502855192011-03-08T11:03:00.000-08:002011-03-08T11:03:39.750-08:00SOUND SENSEWith a good-natured request let me persuade my dear, gentle reader to explore the subtleties of the title I have chosen for my attempt to try and sound the depths of sound, the audiophile's first and last preoccupation. Then let us, together, apply the many caveats of sense in arriving at some sort of an acceptable re-definition of what we have all along been trying to enjoy-- an attempt to 'can' and then reproduce an acoustic event without mutilating its 'life' in any manner. Have we been successful in doing that --at least to a large extent, though with some minimal losses, as it has to be with any imperfect scheme in this imperfect world?? The answer is moot, as any and every sensible person would admit and accept.<br />
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</b><br />
<b>Sense and the Senses</b><br />
Sound happens to be only one of the many stimuli that impinges upon man's senses, making his life more enjoyable or more miserable, depending on variables that are as uncertain as the weather or as some are fond of pointing out, as fickle as a woman's mind. So before this 20% of our sensory input (we have five senses, as has been accepted!) is examined in some detail, it would be educative to look at the larger percentage of the sensory inputs and see how they are dealt with in our day-to-day lives.<br />
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Sight, smell, taste and touch make up the 80% of what all come barrelling at our senses. Have these received a measurement-oriented, scientific 'assessment' of their 'correctness' before being 'accepted' more or less completely? Hardly...<br />
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Painting, before photography made the enjoyment of visual stimuli more universally accessible, reigned uncrowned, yet with its own rules in a world of its own. The entire history of the enjoyment of purely visual stimuli (for convenience, here confined to the world of painting) is without one instance of that enjoyment being the result of a measurement of chromatic or luminance values so as to meet some sort of a 'conformity' to certain arbitrary standards. History is totally silent when it comes to the question of whether the great masters insisted on somebody's knowledge of the 'science' of light and colour before he was accepted as an understudy. In painting, there are times when visual 'verisimilitude' has been given the 'go by' as the masters explored the as yet unseen 'other sides' of the visual idiom.<br />
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Moving forward into the 'modern age' with its preoccupation with, and its possession of the tools of, measurement of most of the natural phenomena, we are still greeted by a lacuna when it comes to the enjoyment of the visual that depends on a set of 'measurements' of a narrow, specialized sort. The stratospheric prices that are offered for canvases of the old masters are not arrived at after a photometric or colorimetric analysis--so far as most of are aware.<br />
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In the visual field the ultimate tools of judgement have remained the same --the same old pair of irreverently inaccurate (aren't they deceived by optical illusions?) eyeballs that man possesses. They had served man over the millennia as we evolved from God alone knows what primeval state to the present when, without batting an eyelid, we write out cheques totalling millions after the auctioneer slams his gavel with the loud proclamation 'Sold' -- all for a piece of canvas with vague 'impressions' created by brushstrokes and paint. It is astonishing to note that NOT ONCE has anybody felt a dire need to re-examine the 'decision' made by the pair of eyeballs in the light of more dependable and accurate instruments devised by man's ingenuity. It just doesn't make sense-- one way OR the other!!<br />
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Now let us for a moment turn to the world of wines, a multi-million-pound industry. It again is a unique world of taste and smell and maybe a bit of hype. Wine tasters/blenders are some of the highest paid individuals. Their nose and their palate are fine-tuned 'instruments' of measurement. But please pause to ponder if those 'traditional instruments' have ever been upstaged by some new-fangled gizmos. No way!<br />
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One of my old friends is a tea-taster. When we ordinary mortals pay to drink mediocre tea, he gets paid--and that too grandly-- to taste any number of prized teas! When I checked last, no machine had been good enough to displace him. Today there is no dearth of analytic instruments, and some of them are truly astounding pieces of hardware. But they are just that--hardware. Would the distilleries in Scotland and elsewhere who pride themselves about the 'undefinable' flavour of their produce ever go for a machine of impeccably accurate 'taste'? I wonder...<br />
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And what about that industtry behemoth that has the entire world by its nose--the perfumers? It is a "black art" that has not yet chosen to go the way of "pure, unalloyed and objective" measurements. The nose, with its two 'inlets' and a single cavity, reigns supreme.<br />
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While on the olfactory plane, think of all those sniffer dogs that do duty alongside an array of sophisticated scanners and detectors at every airport. When it comes to results, often teh dogs are better and surer. The latest wrinkle on the nose (pun intended!) is that Japanese scientists have trained dogs to detect cancers at a very rudimentary stage--much before they come to register on our 'sophisticated' scanners.<br />
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</b><br />
<b>Measuring Sense</b><br />
The senses have been evolving with man and his complex environment. Even when we look at periods considerably shorter than millennia, like an average person's lifetime, we could easily see that our senses evolve quickly and in a practical manner to serve a need. The increased aural acuity of a person whose visual faculty has deteriorated is a case in point. An aurally deficient person has heightened visual acuity as is evidenced from the observation of such persons. By extension, it can be surmised that millennia of evolutionary preferences have equipped us with 'sharp enough' senses to let us make "full meaning" of the plethora of stimuli that flood us every moment.<br />
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While not denigrating measurement as counter-intuitive and as 'clinical', they have to be seen for what they really are. It is something like a "chicken-and-egg" situation. That a phenomenon could have a subtler aspect starts as an educated premise, and we think of a manner and methodology of identifying that with measurement. That means measurement is only an 'extension' of, and not a substitute for, the primary senses. It is only with an acceptance of that factoid that one must get into the world of sensory inputs and their validity, and the essential (yet confusing if not properly understood and deployed)aspect of measurement. What to measure, how to measure and how to correct are questions that ought to be suggested and validated by the sensory inputs primarily, and not in a 'scientific clean room' environment removed from the reality of the world of the senses.<br />
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<b>Sound and Sense</b><br />
Leaving out the little-understood (and even less 'measured'!) sense of touch (which perhaps is made good use of by the visually challenged and certain sighted others), let us now move on to 'audiophilia'. Often there is a clear division here between musicians and non-musicians who are in a way equally enthused about music. I have among my friends a pianist and a bass guitarist. While listening to a recorded piece of music, it is interesting to note the observations of both. The pianist is often concerned about the general tonality and rhythm, while the bass player primarily notes the peculiar manner in which the bass lines interact with the rest of the music. A lay 'audio' enthusiast, on the other hand, notices what is often termed the 'fidelity' of the recording, and often misses the nuances of the musical techniques.<br />
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But before all else, let us ask ourselves a question. Why is it that there is an undue importance accorded to measurement in sound -- that is lacking almost totally as regards the other sensory inputs? Are we justified in stressing certain aspects of the auditory stream for measurement? Is our understanding complete and 'correct'? Why don't we listen to our ears more readily, in a similar manner that we do with the other senses?<br />
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By the way, what do our ears tell us? Over the millennia these funny-looking protuberances on both sides of our head have, along with our peripheral vision and our reflexes, stood us in good stead as survivors in a dangerous planet. Localization and spatial clues, as also clues about the 'character' of the venue of the acoustic event, rock-solid 'mental imaging' when everything including the source and the receiver are moving like crazy, are some of the important data that we glean from the auditory inputs. And to add to the complexity, the 'audio' ranges from a barely audible 20 Hz at one end to another barely audible 20 kHz at the other end, according to pundits. Then there are those on the lunatic fringe who claim that nothing less than 30 or 40 kHz would 'really' make music preserve its 'life'.<br />
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It is comparatively easy to plan and conduct tests which could show that what the ears perceive about the spatial and other clues mentioned above would 'hold together' pretty well even when the range is limited very much. Without going into invloved arguments, it is easy to see that just as with the other senses of sight, smell and taste, the subtleties of hearing too have not been understood enough so that they could be measured 'correctly' and interpreted. The situation is not far from the classic encounter of the five blind men and an elephant. The ' part-interpretations' made by the individuals about the huge animal could very well be true from their perspective, but unfortunately the sum of the interpretations reveal at best only a caricature of the elephant.<br />
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<b>Sound Tales and the Fallacy of Stereo</b><br />
Stereophonic sound originated as an attempt to record and reproduce acoustic events using two channels (or more, as is popular practice today) in such a manner that it could mimic the original event. Has that attempt succeeded to a satisfactory level?<br />
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Here permit me a slight detour, if only to answer the many 'injunctions' from the binaural brigade, by introducing the first of the sound 'tales'. Just prior to starting on a jungle trek long back, I received a few binaural recordings. I do not know how they were made, but I wish to believe that they were made with a 'dummy head mic'. I had at the time a rather good quality Sony Walkman with built-in recording mics, and promptly transcribed the binaural pieces to Ferri-Chrome cassettes using my 3-head home deck. Camping near a river, early next morning I took the Walkman, my fav pair of open headphones, with 'on-edge' transducers that radiated front and back and sat with its edge on the pinna. Sitting on a rock near the river, the surrounding echoing lightly with the gurgle of the river and birdsounds at a distance, I switched on. The recorded nature sounds, played at a moderate volume level, soon had me transported to somewhere far away. The sound was uncanny, with bees buzzing realistically and bird sounds making me look for them left and right and often behind me etc. Switching to some music tracks (sorry, only Western classical), at a slightly higher volume level, I could close my eyes and forget about the actual surroundings and immerse myself in the music and its realism. Perhaps it was as close to real as a recording has sounded to me all these years. But the illusion, though very good, suffered from one drawback-- I was getting a stiff neck from remaining motionless and tensed. A slight movement, and the image moving with me inside my head would leave me confused. It had happened earlier too with the natural sounds, when I turned to look for the bird. The effect was very good while it lasted, but all it took to undo the castle of cards erected by the auditory image was the slightes of head movements.<br />
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I have no wish to take conventional stereo speakers to that wilderness setting in order to see how they would reproduce the "canned reality" in the cassettes. I am prepared to be in my average sized room, and in deference to the 'speaker brigade' I am prepared to follow their directions to the full. So the speakers are set up as per the recommendations of its designer and I am sitting down, again with a stiff neck and an upright posture, and as one of my less serious friends suggests, with the hair parted in the middle to maintain symmetry of the HRTF--that is, IF you have hair! The stereo signal, when played through a 'good enough' chain of equipment, is able to re-create the "recorded reality"--but only when one's ears are precisely at the "sweet spot", a mythical 'ideal' listening position.<br />
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A millimetric shift/rotation of the head plays absolute havoc with the painfully recreated image. If you turn your head, (or, horrors! walk about!) your brain would go into overdrive trying to make sense out of the signals that have gone "out of whack" as they say. With a small percentage in shift of the 'listening position', (I shall attempt to put my finger on its mythical nature as we go into the further tales.) we are no longer listening to 'stereo'; and for that matter, not mono either. Anyday, honest-to-goodness mono is far better to audition than a muddied left or right channel, with some frequency/level dependent cross-interference from the other channel! Your ears never had it so bad...<br />
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Now for some timeless tales; timeless because experiences like these are sure to have occurred to most of the readers/listeners. I was riding home one late afternoon on my noisy motorcycle and as I rolled into our front yard, I could hear my little nephew beginning his violin lessons. The more 'serious' notes of the teacher and the 'scrapings' of the disciple were distinct. On many subsequent occasions through the later weeks, the experience recurred. I noticed that as I rode in, I could identify a few things: were the duo seated in our front hall, or were they in the smaller side room, or at times, were they in the open verandah? The clues about the 'venue' were very strong even in that rather noisy setting. The second thing I noticed was that as I walked in, and went towards the inside room, the 'clarity' of the sound improved, but its basic 'quality' remained unchanged. As I continued walking and turning corners etc, the 'image' as I perceived it, remained 'solid', continuing to reinforce my spatial and other clues. Movement only strengthened the realistic aspects rather than detracted from it. If they were in the open verandah, as I went in, the deteriortion in 'quality' was more abrupt, but the other clues, even with a considerably weaker 'signal', got stronger and confirmed their location and the nature of that location.<br />
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To amuse myself I often imagine a pair of excellent stero mics capturing all the sound clues that the purists have identified and measured and 'understood'. I would feed them subsequently through a 'good enough' reproduction chain. THEN would I choose to walk in. I should be happy if the system could give me 25% of the realism that I was used to over the months; forget about the quality and the 'signature' of the venue and all that. But the moment I started walking, the whole thing would "skew", driving me nuts if I was serious about 'interpreting' what I heard. Frankly I would be more comfortable with a mono recording-reproduction chain; at least the image will not skew and confuse my brain as I moved, coming as it did from a single, stationary speaker.<br />
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That should tell us one thing--two of everything do not make a thing better always! It is a simple experiment within the capabilities of any lay enthusiast. Try it and be confounded.<br />
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The second of these "stereo listening position" tales, again, presents a scenario likely to be familiar to many. I am fond of visiting temples. Large temples with huge corridors and high ceilings, all usually carved from granite, have astounding acoustics. Cathedrals come close to the acoustic experience, though the temples are quite unique in their 'signature', believe me. I have often walked towards temples I hadn't visited earlier, and oftentimes have wondered at how close an 'image' of that acoustic venue could be gathered by my brain as it 'listened' to the chanting/singing that was going on inside. The moment you walk in and are in the proximity of the 'event', a veil is lifted to reveal absolute clarity. But the artefacts that had suggested to you the 'layout' of the venue and its acoustic signature a moment ago, get stronger and confirm the image, and then you IGNORE that image, including the decays, reflections etc and perhaps the Haas effect enables you to hear only what you wish to hear with a clarity and 'involvement' that has to be experienced to know it.<br />
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As you walk away, again, many things shift, and the signals grow weaker, but the 'clues' remain strong as ever giving you 'solid' images. The experience is enriched when a group of musicians circumambulate the temple corridors, and from where you are standing --and listening!-- you continue to receive "updates" about the passages and corridors and the open areas through which the team passes. It sure is a complex data-flow that manages all that in real time!<br />
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Is there a way to "capture" all that, or even a small part of that?? And reproduce that with a modicum of realism? What stereo deployment of mics will do duty here? What about the speakers? And what 'listening position' will be advocated?<br />
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The above are acoustically extremely complex situations. We cannot yet imagine to 'tackle' them--certainly not with our current technology and with our current "understanding" of the art and science of sound. Much less, we haven't yet learned to "capture" a non-professional duo like my nephew and his teacher sitting in a corner of the front hall of my home. What we pretend to do with what we conveniently push as a solution to all sound ills --stereo-- is at best a false caricature of the real. The ideal listening position is a myth that is there one moment and not there at another--there is no sacrosanct thing as a 'listening position', though with conventional stereo, it is a must.<br />
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<b>Sound Progress</b><br />
An understanding of what we are doing wrong, or not so right, is the first step in seeking out the proper direction. What our present technology cannot hope to do --ever-- in its present state is the one realization that can push us onto more productive pathways of exploration.<br />
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What are the aspects that need to be captured to preserve at least the chief characteristics of a real acoustic event? How to code and decode that? And, more importantly, how best to reproduce that so that the "canned reality" is reconstituted into a semblance of the original? These are serious issues that call for serious, fresh approaches.<br />
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Such a thinking would make sound sense!<br />
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<span class="Apple-tab-span" style="white-space: pre;"> </span>* * * * * * * * * * * *The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-43446952194409459562011-02-21T01:36:00.000-08:002011-02-21T08:43:14.823-08:00MEASUREMENTS AND THE ENVIRONMENT<div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;">With all due respect to, and without even a distant thought of denigrating the efforts of those stalwarts whose efforts have advanced the state of the art and science of measurement to what it is at the present, permit me to present the following.</div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">Measurement has been at the core of understanding the environment, be it the visual or the auditory, or for that matter, any other. Over the decades, a fuller understanding of the acoustical environment had necessitated the use of various tools to measure acoustical events and classify their characteristics as a first step towards that aim. However, there appears to be as much disagreement as there is agreement in what to measure and how to measure. There is also the possibility of other dimensions, other parameters existing, which do not easily lend themselves to our known tools of analysis. A sane approach, it is evident, would accept that measurement and understanding is a classic "chicken and egg" situation at best. How could you measure without understanding, and how could you begin to understand without measurement?<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">History is full of instances of inspired surmises that led to both an initial conceptual understanding and subsequent measurements that led to a finer distillation of both the original concept as well as the tools of measurement. In order to approach the concept of measurement in as dispassionate a manner as possible, particularly in a field as passionate as sound and music and its reproduction, one needs to take a second look at distant cousins of measurement.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">In the near past the standing joke about Relativity was that only a couple of people understood it clearly--Einstein, of course, and then God! In today's world how many people have a grasp of the dozens of dimensions beyond the third and the fourth that a respected master mind like Stephen Hawking proposes? We wouldn’t be far from the truth if we repeat that only a couple of people understand that too! That should tell us that what we hold as supreme truth appears to be so only because of our ignorance of "other truths", other dimensions. <o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">In the context, it will be interesting to look at another classic urban legend about the dozen, fifty or even hundred words (depends on your viewpoint) that the Inuits and Aleuts have for describing snow. (<span style="color: blue;">http://www.putlearningfirst.com/language/research/eskimo.html</span>) English too has its share of related words--powdery snow, sleet, slush, flurry, blizzard... When we see water, our reaction could be anything from water to lake to pond to river to ocean, and then some. Our understanding of the environment calls for an ability to 'measure' and classify what is around us. The different words for snow, and water, be it in English or Inuit, is an attempt at ‘measurement’ as a way of identification, classification and understanding.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">A personal experience of mine from some years ago could be read in conjunction with this to explore the concept of 'measurement' from another angle. When a fishing boat belonging to a friend who owned a small fleet failed to return to harbour, a 'search and rescue' mission was launched. I, emboldened and sustained by little more than over-enthusiasm, jumped at the opportunity to join them for an all-night chase in the seas. As the small boat with a couple of outboard engines (for speed!) chugged out, I Iistened in on the hurried consultation among the crew and their skipper. They were talking about 'places' in the wide open sea the way we would mention the street corner near our home, or the big intersection near the park or maybe the turnoff in the highway. Using dead reckoning and a simple compass, they set course and we sped on for a couple of hours. I asked the (foolish) question why we were not keeping the search light switched on. The answer was a flip of the switch and a question directed at me about what I could see. With chagrin I realized that the "illuminating" light confused me by what it revealed of the endless rollers and the dark vastness of the sea. My measure of a 'logical' action did not apply here. As the night wore on, we spent hours zigging and zagging first to one 'location' and then to another. The language in which the “old salts” communicated told me nothing, but it made perfect sense to them. At long last they tried an unlikely location and we were able to "raise" the lost boat, which was drifting with a dead engine.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">Translate this scenario into a modern setting with all boats equipped with GPS and communication gear. The GPS gives you accurate 'measurements', and your navigational 'measurements' would zero you in on the target in a matter of time. But what had happened in the pre-GPS days was another way of more or less accurate 'measurement', which too produced results, and that too with very few inputs! From dead reckoning and a compass we have come a long way to the GPS. But that doesn’t prove that the GPS is the only form of accurate measurement. It also doesn't prove that the GPS is the ultimate. Where are we headed technologically in the post-GPS days? The great seafarer-anthropologist Thor Heyerdahl had time and again paid glowing tributes to the navigational 'measurements' of the Polynesian islanders who were total strangers to the European navigational methodologies. For arguments' sake you could say that they were "not right", but we have to admit they were and they sailed the vast oceans with more daring and confidence than many, thanks to their little-understood ways of 'measurement'.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">If you have come this far, you are in some agreement that measurements, in its varied guises, are at best a complex and vague (until you have mastered it, that is!) territory, though we all agree that they are central to understanding.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">Our interest in an acoustic event has come way beyond its primary function of relating ancient man to his environment by serving primarily as a warning signal. This was the reality of prehistory when man lived as a hunter in a variety of physical environments. Evolution has equipped man with a hearing mechanism that can present a rich data flow to his brain and give him accurate visualizations of his environment. Ever since Thomas Edison realized his dream of “canning” an acoustical event, man has been facing the dilemma of what to capture and what to throw out in order to maintain what each generation thinks is 'fidelity'. Nobody who has listened to an early recording would consider it as having any 'fidelity' whatsoever. But to the early listeners of this wonder, it sounded "life-like". Obviously the ‘measures’ were different!<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">It would be instructive to look at what happened after Edison's little toy came into the 'market'. Comparisons were made between something newer and Edison's recording (measurement, again) and the public went after that elusive thing called 'better/higher fidelity'. This chase of the ephemeral continued until in the post-war era, when the world largely settled on 2-channel stereo as the ultimate in fidelity. 'Measurements', by now far more complex and more involved and so technical that you would need a degree in engineering to understand many, fuelled the forward march of stereo from then on.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">And THEN we got lost in the forest of measurements, because we lost sight of the basic fact that measurement and understanding were the chicken and the egg!<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">Whether you are at a concert or merely walking the busy urban streets, or leisurely enjoying a walk in the wilderness, acoustical events impinge on your ears all the while. You are not merely trying to place each of the musicians from your front-row-centre vantage point. The sum-total of your acoustical experience builds and projects an image of "truth" in your mind. What are the acoustical characteristics/parameters that contribute to this? Do we understand them fully? Only when we can list out these parameters, we could think of identifying and classifying and perhaps recording and then later reproducing those parameters in an attempt at recreating the original "truth".<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">While considering acoustic events, it would be educative to look at the non-sighted navigating our urban cityscapes. I have often observed the average blind person using a "sensing stick" that produces echoes which tell him a lot about the environment. I personally know a gifted but visually challenged person who uses nothing except an occasional snap of his fingers while “navigating” at an astounding speed through a challenging "obstacle course" in the busy city centre, which would, at such speed, in all likelihood bring to heel a normally sighted person! I have seen him dodge an obstacle at his face level at the very last moment and ducking to negotiate a walkway. This should tell you that with training, the visual correlation that auditory signals can recreate in your mind is simply awesome.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">When you begin to accept the complexity of what we are trying to understand with our simplistic measurements, then only you will admit the inadequacy of our tools and our primary understanding of acoustical events and the richness and complexity of their parameters.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">What is needed at this juncture, IMHO, is a "brand new look" at what all characterize an acoustic event and how best to measure it, so that when we come to recording and then replaying it, we could conduct some more measurements and see what all we have lost in the process, and then perhaps learn how best to regain that --and along with that, the reality and the “truth”.<o:p></o:p></span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN"><br />
</span></div><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN">Listen and you will see what I mean, and for that you don’t need anything more exotic than what virtually all are fortunate to have--our ears!<o:p></o:p></span></div><div class="MsoNormal" style="margin-left: 162.0pt; mso-layout-grid-align: none; mso-list: l0 level1 lfo1; mso-pagination: none; text-autospace: none; text-indent: -18.0pt;"><span lang="EN"><span style="font: normal normal normal 7pt/normal 'Times New Roman';"><span class="Apple-style-span" style="font-family: Symbol; font-size: small;"> </span><span class="Apple-style-span" style="font-family: Symbol;"> </span></span></span><span lang="EN">* * * * * * * * * * * *<o:p></o:p></span></div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com2tag:blogger.com,1999:blog-7571199246096728102.post-50364184498389942072010-10-07T07:26:00.001-07:002010-10-13T07:09:01.839-07:00Sound - 4<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">---------------------------------------</span><br />
<div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">SWIMMING TRICKS<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">---------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;"><br />
</span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHqQBNTvVUHPgoPOCchsxdgLpOwIwCeIcyAbfG1OmKnPK9AV9R7TP4r0O1OzNg7ZZ4ILP61G_1MhjZNqZZV0x-2Yp6Thd9ao3VP5WV7vvr055VYdDPEu3tbsR6rWnahmV3_pElwUXH96c/s1600/first-swim.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="165" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHqQBNTvVUHPgoPOCchsxdgLpOwIwCeIcyAbfG1OmKnPK9AV9R7TP4r0O1OzNg7ZZ4ILP61G_1MhjZNqZZV0x-2Yp6Thd9ao3VP5WV7vvr055VYdDPEu3tbsR6rWnahmV3_pElwUXH96c/s400/first-swim.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">First lessons...</td></tr>
</tbody></table><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">I trust most of you know swimming.</span><br />
<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;"><br />
</span><br />
<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">To those who don't, water is a scary thing, while to those who do, whether they are good or indifferent swimmers, a session in the water is a larky time. When you take somebody to the water first, the thing to do is to explain what fun it can be once you learn how to float at least, and then 'teach the ropes' like how to float, then how to hold your breath, how to take those first flailings of the arms and the legs. Then slowly things fall into place and you are on your own. After that a more knowledgeable person can comment on your 'style' and give you tips to improve your style--all from 'terra firma' without getting his feet wet even. How? Because you know enough to do the basic thing well; it is now only a matter of 'polishing'--which any intelligent person could manage with the right kind of help/tips.</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Audio experimentation too is a lot like swimming, I guess.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Quite a few of my younger friends who follow the blog were impatient with me for "not coming to the point" ASAP-- that is, as soon as possible. And in their dictionary that means 'immediately'! I resisted the temptation to succumb to such a 'short-cut' method, fearing the very real dangers inherent in such an approach. Let us, please, spend a little more time to perfect our technique before venturing deeper, so to speak.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Knowing why you do what you want to do is part of the learning/knowledge process. Also, finding out why what you have done is not giving you the exact results you wished for is another step in the right direction. Everybody doing something needs tools. And some of the tools are physical; these days a lot many tools are software based; and yet others are intellectual--what you carry within your head.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">So believe me, you have got to learn how to stay afloat and swim and not commit suicide--before you can try new tricks. So, please, back to the shallow water.....<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">THE BALANCING ACT<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5qL7fwE9C7IK-pVvgGBgvC6kjQY7XP89PNLcniMM9Wp7XQjp3dy1B-ugd38D5AdzHr1w-c3B8no5jI94Dn3JFNo7ehCAUTQJkYhUhZ6TnndWVfkJgntvQtrE0wQ2T709wtGNfHiYGVYA/s1600/balance1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="168" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5qL7fwE9C7IK-pVvgGBgvC6kjQY7XP89PNLcniMM9Wp7XQjp3dy1B-ugd38D5AdzHr1w-c3B8no5jI94Dn3JFNo7ehCAUTQJkYhUhZ6TnndWVfkJgntvQtrE0wQ2T709wtGNfHiYGVYA/s320/balance1.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"><br />
</div></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">In water, as well as in audio, balance is everything. But please don’t confuse it with the 'Left-Right' balance control for stereo,</span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2m0rC89hAYBL60f4OUE56sVYc0XSbSZbP46z5zgcyIjVHwM18EuMRJLvcYr4OT78iWYW-o2O4FkxUfLzB9PvZR9W6tC1RnC_MxPOYgF9oT7soYWd6iPtuxZgJFr9bksLs4fc2ZfDqOzs/s1600/balance+control.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="64" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2m0rC89hAYBL60f4OUE56sVYc0XSbSZbP46z5zgcyIjVHwM18EuMRJLvcYr4OT78iWYW-o2O4FkxUfLzB9PvZR9W6tC1RnC_MxPOYgF9oT7soYWd6iPtuxZgJFr9bksLs4fc2ZfDqOzs/s320/balance+control.png" width="320" /></a></div><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;"><br />
</span><br />
<div class="separator" style="clear: both; text-align: center;"></div><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">though that too IS another important 'balance' for us.</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">If you will go back to the previous post and review things you will see that we spoke of 'aural balance'.</span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgS4VelSUwMwLlq6s8stNHHndMPAjpj0jYxy5ybohkru4BCYVgcr5rFxuUfdw91rJYC-DH3QLLJLhk_Zzbaag4fz8pHgtPpmlo_uwzmZO9qnm80mLXZBUmRTgr6TDI9Of-cdQH_BreCyxo/s1600/sound+balance.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgS4VelSUwMwLlq6s8stNHHndMPAjpj0jYxy5ybohkru4BCYVgcr5rFxuUfdw91rJYC-DH3QLLJLhk_Zzbaag4fz8pHgtPpmlo_uwzmZO9qnm80mLXZBUmRTgr6TDI9Of-cdQH_BreCyxo/s1600/sound+balance.jpg" /></a></div><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">We have over the years somehow misled ourselves into thinking that drums = bass, and shrill sounds meant treble. Right....and wrong! If you were lucky to 'thump' a drum 'live'--any drum--and kept your ears open, you would have come to certain new conclusions. An 'easier' drum to learn the difference is the humble native 'mridangam' with its complex tonality. No musician will let you 'thump' his favourite instrument, so better request him to play a couple of bassy 'thumps'.</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Close your eyes and 'stretch' the sound in your mind-- at least try to. The strong bassy thump will be followed by a very complex tone structure that extends well above the usual 'bass range', you will admit. Ask him to play a few more bars and you will easily 'hear' that the mridangam has a complex sound and it extends much above the 'foundation' of the low notes. Try it with other popular drums, and even with a Western kick-drum. You will --unlike the 'thump-boom car-stereo crowd'-- hear for yourself that even the huge kick-drum produces NOT a single frequency bass note. <o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">When you talk over a phone, often you find it easy to identify the person at the other end, though the connection and the phone may not exactly be 'hi-fi'. How does this happen? The human voice is a complex mix of tones and overtones, all 'locked' to the physical nature of your 'sound-box'--your vocal cords, your throat and nasal cavity etc. Scientists have established that you dont need a 'hi-fi' range of 20 Hz to 20,000 Hz to identify and recognize the person. Intelligibility needs an approximate range from say, 400 Hz to about 4,000 Hz, and that includes both male and female voices, virtually the entire set of voices you are likely to come across in this wide world!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">In a similar manner, the 'mix' of the basic tone and the many overtones lets you identify that, yes, "this is a mridangam", and "this is a tabla-dekka combo" and "this is a snare drum", and undoubtedly, " this is a kick-drum". Drums do NOT produce single-note thumps. So for your system to have some fidelity, it will have to preserve and reproduce that complex sound pattern in its entirety.<o:p></o:p></span><br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3UOFYjwHTUbkcU-PN3wajySqFLHNzngssk98u52E5gTGrzc2GI1pgwSkydupIPmVR4sC4WyVD2oaezmhvzYgIzM0MbU9g8Go0VhJDs-OJUl1f-M1wmB3isL5ag1foeYGIs9m92x_MBSI/s1600/frequency_chart.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="221" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi3UOFYjwHTUbkcU-PN3wajySqFLHNzngssk98u52E5gTGrzc2GI1pgwSkydupIPmVR4sC4WyVD2oaezmhvzYgIzM0MbU9g8Go0VhJDs-OJUl1f-M1wmB3isL5ag1foeYGIs9m92x_MBSI/s320/frequency_chart.gif" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Frequency Range Chart</td></tr>
</tbody></table></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">The ratio in which the low and the higher tones mix in real life is the 'balance' that we aim to preserve. If, for example, you increase the proportion of the lower notes, immediately it becomes somewhat unlike the original, and a gross imbalance can 'kill' the sound signature. This is why we spent some time twiddling the 'level' control of your bass bin of the 2.1 speakers to approach a 'realistic' sound, a sound that compared well with the original ‘live’ sound.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">This is important, and you have to practice getting the 'aural balance' right--IF you are serious about fidelity.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">FREQUENCY RESPONSE<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Yes, you are familiar with the term FR and you have used it often. A mini quiz for you. Pause right here and tell me clearly what it is; explain it to me as if I were a dumb/deaf ignoramus. I will let you take about three minutes.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Your three minutes is up. Now, did you do that nicely so that my 'ears were opened'?? I dont know...<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoz1m95SjubG7e9IJoOOe9-vGm3CnFe6CwtiYvZy1bB5FoiGaC-iu-ikJRC_oZ0a5f43HJVd4mq9hVbhwsE_cO-o2FUj5takwfNTuj8FyuCclByrLqOfJVNsfKoBaxjlk7F1ZtQLNRyOY/s1600/frequency-response.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhoz1m95SjubG7e9IJoOOe9-vGm3CnFe6CwtiYvZy1bB5FoiGaC-iu-ikJRC_oZ0a5f43HJVd4mq9hVbhwsE_cO-o2FUj5takwfNTuj8FyuCclByrLqOfJVNsfKoBaxjlk7F1ZtQLNRyOY/s320/frequency-response.gif" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">A typical real-world 'flat' FR curve</td></tr>
</tbody></table><span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">Frequency response is important because of the thing that we mentioned earlier--'aural balance'.</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">If you look at the spec sheet of virtually any audio equipment, it would contain a figure for that, and nine out of ten, it would include that magical range 20 Hz to 20 kHz too! We will look at all those figures and split our hairs much later.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Basically FR tells you how UNIFORMLY an equipment reproduces sounds within that specified range of frequencies, from the lowest to the very highest. An amplifier, naturally, should amplify everything fed into it.</span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMZaoAuGugkz65YrvElt6FZ0gug8361iYHRPyr2Tr6XyqoOrr4cyn0H2x7-HwRPAqeGXFKckxi_jK_nBbeTNaOOhykgh536eJqlRU5Dh0XQmhAd9ss4KrLyNScVAy_q8GhqmAqEbqIm2g/s1600/amplify.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="115" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMZaoAuGugkz65YrvElt6FZ0gug8361iYHRPyr2Tr6XyqoOrr4cyn0H2x7-HwRPAqeGXFKckxi_jK_nBbeTNaOOhykgh536eJqlRU5Dh0XQmhAd9ss4KrLyNScVAy_q8GhqmAqEbqIm2g/s320/amplify.png" width="320" /></a></div><span lang="EN-US" style="font-family: 'Times New Roman', serif;"><br />
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<span lang="EN-US" style="font-family: 'Times New Roman', serif;">But it should strive to preserve the LOUDNESS RELATIONSHIP between the various frequencies/frequency bands produced by voices and instruments. In other words, it should NOT over- or under-emphasize any frequency or tone. This is what we term that most desirable of qualities in any audio equipment--a flat frequency response, or “more correctly”, a frequency-amplitude response.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">It is commonly accepted that the range we need for hi-fi reproduction is from 20 Hz to 20,000 Hz, and such a standard was originally specified by the German Standards Institution or DIN. Of course there are other 'finer details' for specifying that, into which we need not go now. But we should always remember why it is important. Without a flat FR, the delicate and correct 'aural balance' of the low and the higher tones would be lost or wrongly presented, and sadly, the fidelity will be lost.<o:p></o:p></span><br />
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<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">And just go back and remind yourself what 'fidelity' means. Our whole exercise is to 'improve' the level of fidelity that we can achieve, though it would be a virtually futile exercise to 'gun for' absolute fidelity--at least under our typical conditions.</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Now with those ideas clearly in your mind, go back to your listening experiments and experience.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">As always, keep your ears open, and your brain buzzing with activity!!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Listen, and you WILL hear!!!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">more to follow<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------</span></div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com1tag:blogger.com,1999:blog-7571199246096728102.post-12319044153536302582010-10-05T07:44:00.000-07:002010-10-05T08:46:34.344-07:00Sound - 3<span class="Apple-style-span" style="font-family: 'Times New Roman', serif;">---------------------------------------</span><br />
<div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">NOW HEAR THIS ...<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">---------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Surely, that is NOT a plug for the Californian speaker company whose tagline is 'now hear this', and who 'wanted to save the world from bad sound', according to the founders.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">That, per se, is a laudable and noble aim. You may not know, nor think it a great calamity, but the world is increasingly getting mired in 'bad sound'. One man's bad sound will be another's worse sound, if not the worst. As in quite a few situations, here too you need to have some 'standards', without which all such subjective statements become no more than highly prejudiced, if not ill-informed and downright stupid, 'rants'. Hence my earnest call, "now hear this..."<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">LIVE AND NATURAL ...<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span><br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdyBMTSqoSczLbXT0imzwUuZkZqsEUFZ4w0LBpv27I4Rjek3HbbjHMFGTDdhDvfn085FnRXzl9PsFRjAVTcMTlJ-uqj3jHunRxFgeBT2xNfGbWW2Jh-lOeF6Xf0SQ59w4u_5ap7WJbsLI/s1600/live+music.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="162" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdyBMTSqoSczLbXT0imzwUuZkZqsEUFZ4w0LBpv27I4Rjek3HbbjHMFGTDdhDvfn085FnRXzl9PsFRjAVTcMTlJ-uqj3jHunRxFgeBT2xNfGbWW2Jh-lOeF6Xf0SQ59w4u_5ap7WJbsLI/s320/live+music.jpg" width="320" /></a></div><span lang="EN-US" style="font-family: 'Times New Roman', serif;"><br />
</span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">That is 'live' sound, and one has to admit, that is as natural as it comes! There are companies and companies in the audio field and of course, an almost wild range of products too. But when it comes to audio designs, it is a fact that often one that is designed by an engineer who is also a musician, sounds a bit--or sometimes a lot-- 'different'.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">So let us hear this.....this difference.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">I want you to be a little bit adventurous and 'experimental’. If you are a musician, or can get a musician friend to co-operate, all the better. Otherwise, do not worry, but you might look a bit silly to other folk at home while 'experimenting'. I assume that most of you own and use computers and these days the computer can double up as a pretty good sound system, a better recorder than the typical cassette machine of yesteryears, and even as a combination test equipment like say, an audio signal generator or an oscilloscope. The possibilities are there and they are within reach of the average hobbyist or enthusiast. Now get hold of a good microphone--not the cheap one that comes with the standard ‘chat’ headphone. Buy a good compatible separate microphone that plugs into your sound card. The plug will be like your headphone plug, but one connection supplies an operating voltage to the microphone. So buy one that is compatible.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Fire up the sound recorder or some other software you use for recording and try recodring with the mic so that you are familiar with the drill. Now in an average room with some peace and quiet, ask your musician friend to play his instrument. A flute can sound wonderful in almost any setting, and so can a saxophone. We are likely to have violin playing friends, and some 'mridangam' (that is a South Indian drum for accompaniment in classical concerts, dance programmes etc) artists too.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Let them sit away from the walls, as far as possible, and play for a while, so that you have the sound of the instrument etched into your mind, in a way. Towards the end of this 'live' session you can put your finger into one ear, and move around closer to the instrument to discover from where and at which distance it sounds clearest. Now ask him to play for another few minutes and put your mic in the earlier-discovered position and hit 'Record'. Save the file after giving it a suitable name.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">If you can play and sing, or at least read a play aloud with some nuances, it will be even better. Save that file too. Next (especially for those without musical abilities!) take a few things like a toy drum, or even a plate and spoon and try banging it like you have gone nuts a little. The aim is to listen to the sound of the banging and remember how it all 'sounds'. Record a few sessions like that. Your imagination and your resourcefulness set the only limits here! (It will be an interesting exercise to record yourself also, singing or reading aloud--so that later you could 'discover' yourself.) In all the above situations make sure that as the mic is a single 'mono' mic, it is placed as close as is possible to the source so that it is immersed in the ‘direct sound’ and is not flooded by strong reflections and echoes.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Your first attempt at playback of the recorded files will be a strong lesson in disappointment. Your recording of the flute or mridangam or violin will sound like a 'dead and artificial' ( I picked the words as being the opposites of 'live' and 'natural'; but it pretty much illustrates the result) instrument. But then listen some more and see if there is something you like in that recording. When you listen a lot and do some mental comparisons, you will come to realize certain things. Your recordings--all of them-- sound as if they are 'covered by a veil'. This 'veil' is the loss of fidelity brought in by the imperfections primarily of the cheap mic, the reverberant small room etc. But overall, the digital recording process of the computer software preserves without much loss most of the things that have been fed into the system.<o:p></o:p></span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlqYJGEmqVnZGXyn1Qy4XoLr6J6G8YoxeiJbIeI6usJso2JbSmmD3VTF2T1ki6Jh6st5rF4WekOnoNx-rqAl_kV6oFgvLw1U-1exb3mmB92U74jyt3KboaDgtBXjN9GuWg3uHu9yCfFwM/s1600/music-at-the-temple.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="239" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlqYJGEmqVnZGXyn1Qy4XoLr6J6G8YoxeiJbIeI6usJso2JbSmmD3VTF2T1ki6Jh6st5rF4WekOnoNx-rqAl_kV6oFgvLw1U-1exb3mmB92U74jyt3KboaDgtBXjN9GuWg3uHu9yCfFwM/s320/music-at-the-temple.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">'Live' music at a temple</td></tr>
</tbody></table></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">It is also advised that you should attempt to go to venues where somebody is singing and playing live. Not 'live' rock shows or other such 'modern' shows where high-powered amplification is the rule rather than the exception. But to places where one or two people sit around with their instruments and 'jam'. If you visit a village, especially a north-Indian village, opportunities galore for experiencing 'live' musical evenings. I feel this aspect of listening to 'live sound' under various settings, becoming familiar with a range of voices of all sorts and shades and colours, is important for the aspiring hi-fi enthusiast. One wonderful thing it does is to set you free from “notions of bass and treble” and such other often dubious and confusing terminology, and lets you learn to assimilate what could be termed the 'aural balance' of a natural setting.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">LIVE versus REPRODUCED<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">--------------------------------------------<o:p></o:p></span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrjCZOkdD4vbrkO4hbj3sJR-sPjNyOAosKxMOrE4Q6OTxjJjV_tl9xwdTLMkMu0BOJ6FWoNFhyphenhyphen4Dq8jDMCDsxevfhfU5diMMKL82lekj9BcGy0hiY9MIomPIAMC6BNF1N9yVmXoiDBPWg/s1600/flautist3.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="297" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrjCZOkdD4vbrkO4hbj3sJR-sPjNyOAosKxMOrE4Q6OTxjJjV_tl9xwdTLMkMu0BOJ6FWoNFhyphenhyphen4Dq8jDMCDsxevfhfU5diMMKL82lekj9BcGy0hiY9MIomPIAMC6BNF1N9yVmXoiDBPWg/s320/flautist3.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Flautist par excellence--Lord Krishna</td></tr>
</tbody></table></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Now the 'trap' has been baited with tasty morsels. You have heard your friend play and sing in your own room, and, honestly, it has been an 'ear-opening' experience. At first it sounds like it is nothing great, but on a second or third 'listen' somehow you 'grow close' to the sound. For me the sound of the flute as it 'filtered through' the fingers of my young friend and neighbour wove a mystical curtain of sound. Not ‘impressive’ in a big way, but very subdued and soft, and it was vibrant with 'life'.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">When I played back my sound file from the computer hard disk, it didnt at all sound like my friend did just a few minutes back. I could/would never in my life accept that as a 'stand-in' for the 'real thing', I vowed. Most of you too will go through that experience when you try it. But then tell yourself, just because a well-known friend has put on a 'veil' does it mean that you cant recognize him/her? No way. Some of the features might be veiled, but it is the 'genuine' person all right. This is something like it.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Forget about stereo and mono and all that. I assume most of you have your "2.1 speakers" plugged into your computer. That is the usual left and right channels for stereo and a 'point one' channel for the lower octaves or the bassy sounds. We will examine the theory behind such systems and their desirability etc later. Now put those two 'satellites' (such 2.1 systems are also called 'sub-woofer/satellite’ systems, or sub-sat for short. Again, terms like 'sub-woofer' need to be examined in detail--later.) on both sides of your computer monitor, and preferably away from walls and corners. Place the 'sub' on a shelf where it is easy for you to adjust its 'level' control.<o:p></o:p></span><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcfdzTvBIYSQi5IgV2b51ed2FzlIN0wrrTz8kTvbGCzrpm2kv72jAE1vCRNm67t4dbMWgTRZLBMawXXJtl0SEY0tTa8rL_h8-FyYbsnZil9DlrOKvYHBtOfAYAJlzWzxabm5TYLB8umcE/s1600/sub-sat2.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="181" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjcfdzTvBIYSQi5IgV2b51ed2FzlIN0wrrTz8kTvbGCzrpm2kv72jAE1vCRNm67t4dbMWgTRZLBMawXXJtl0SEY0tTa8rL_h8-FyYbsnZil9DlrOKvYHBtOfAYAJlzWzxabm5TYLB8umcE/s320/sub-sat2.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Popular 'sub-sat' speaker systems</td></tr>
</tbody></table></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxP6Xk2_rkaOlAPN5G0llbmsyOEQ5AHApo-kLY7yZABemPWTCJqP0XZg8PkuGkLk6knyeUtN1K5TgJoJmNaUNzC4Hqc_J6iCbSWDgxtWP60WiAEuf0BgsU4fX8OgQItTDLxCNkceuUvu0/s1600/sub-sat1.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="236" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxP6Xk2_rkaOlAPN5G0llbmsyOEQ5AHApo-kLY7yZABemPWTCJqP0XZg8PkuGkLk6knyeUtN1K5TgJoJmNaUNzC4Hqc_J6iCbSWDgxtWP60WiAEuf0BgsU4fX8OgQItTDLxCNkceuUvu0/s1600/sub-sat1.jpg" width="320" /></a></div><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Forget that you know the meaning of 'bass' and start the playback of your file. Rotate the sub's level control all the way to zero and listen. If it is a flute or violin or bulbul, you wont miss MUCH. Well, if your recording is that of a drum like the mridangam or a heavy male voice, you will perceive that the reproduction is somewhat 'thin'. It lacks the 'foundation' of the lower notes. Now SLOWLY advance the level control so that you think you could sense the recording slowly getting "nearer to the original sound" you had heard in your room--let the 'veil' be there for the time being. Stop right there. Now play back some of those other files, including the banging sessions. Spending an hour or so in such an exercise will leave you with a totally different notion about the 'balance' of what you hear. Now sit back and listen, move yourself forward and back, adjust the volume control for a comfortable level that 'approaches' the level of sound your friend produced playing live. Continue to listen and listen...and listen.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">LISTEN... and you will HEAR !<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Very slowly you will love hearing your recording. You will soon be hearing many nuances that you never even suspected were there in the recording! And the sessions will have a guaranteed effect-- it will leave you 'aching' for the 'real thing'...your friend and his flute, time and again.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Those who have a good pair of stereo microphones and a preamp for plugging them in, may try feeding the signal to the computer and recording it again. Dont aim to achieve 'stereo' or anything like that. Just place the mics about a couple of feet apart so they catch the 'direct sound' and not the reflections that swamp the room. If you have an old cassette recorder, you can put it into record and pause, and feed its output via a cable to the computer and record that. This newer recording will sound far better than your earlier one. Again, play with the reproduction levels and try to achieve a sound as close to the live sound as possible. The live sound as you heard it in your room is the 'touchstone' upon which you judge the reproduction.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">You will be surprised how close you can get to the 'real sound' though the 'veil' will be there. Truly it will be, as I said earlier, an 'ear-opening' experience, and we need that if we are to 'judge' what is ‘good’ and what is not.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">How many times have you noticed cars driving by with a strange 'thump' emanating from them? Those are the 'subs'. Even ‘respectable’ speaker makers market them with the tagline (yes, I recently saw that in an ad) “get punched by our subs”, with accompanying picture of a ‘sub’ driver unit and a boxing glove!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Have you ever asked the important question, are those subs contributing only 'their percentage' of the total sound, or are they brashly 'dominating' the 'balance'. No question, they ARE.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Last question: Then will that be music? If you are crazy to put a nut inside your car with a drum set and let him bang away to his heart's content and then try to reproduce similar levels with your subs and the rest of the equipment, you might be able to claim that it IS music. But that is the time for you to ask yourself again: Does that system make it easy to identify the sound of different drums? Or do they all sound the same with an overwhelming, thumping 'bass line'? Honest answers are not very pleasant. So too is truth!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">The reproduction of music is dangerous territory with all sorts of difficulties lurking round the corner to trap you if you are not careful. But it is not often your ears will lie to you.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">Listen to them, and dont hurt them with loud thumps that masquerade as music. If music was just thumps, man wouldn’t have invented all those other instruments! And, come to think of it, man's ingenuity has given us a vast range of drums! And if you listen closely and carefully they will speak their language to you.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">The art lies in listening!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">So remember, keep your ears open, and your brain switched on!<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><br />
</div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">more to follow<o:p></o:p></span></div><div class="MsoNormal" style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;"><span lang="EN-US" style="font-family: 'Times New Roman', serif;">------------------------------</span></div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-57220843245117680302010-09-30T07:53:00.001-07:002010-09-30T08:48:07.088-07:00Sound - 2------------------------------------<br />
FIDELITY FUNDAS<br />
------------------------------------<br />
<br />
Used, over-used, misused, hyped....?<br />
All those are terms that could describe a couple of very popular words.<br />
<br />
Hi-Fi and Stereo.<br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFfZ-A6j8RPhu2JGo9GYGPzZAjwcVN8mElE8hk7FyscKlgy68B-5-0NRMH_twiy4M4SGRP1uNp34emKdobYuBvpAg5a-rXryfYKIkNgB333513nzp5s4tWVzuBi9E9NKdrqLWROphLGys/s1600/stereo.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFfZ-A6j8RPhu2JGo9GYGPzZAjwcVN8mElE8hk7FyscKlgy68B-5-0NRMH_twiy4M4SGRP1uNp34emKdobYuBvpAg5a-rXryfYKIkNgB333513nzp5s4tWVzuBi9E9NKdrqLWROphLGys/s1600/stereo.jpg" /></a></div><br />
How many of us 'connect' to the fact that hi-fi is short for 'high fidelity'? It is interesting to note the dictionary meaning and also look at what that 'high' is doing there. Any good dictionary will tell us that 'fidelity' means the 'faithfulness' or the ‘exactness’ with which the original is reproduced, copied etc. If the reproduction has 'fidelity', then it resembles the original. The greater the fidelity, the closer the resemblance. (We will return a bit later to these popular, but vaguely understood terms, including ‘stereo’. For the moment let us just say that 'stereo' --short for stereophony-- is only one of the many ways and means to achieve that elusive 'fidelity' in reproduction.) But first let us try opening our ears a little bit.<br />
<br />
For our purposes, we could re-state fidelity like this perhaps. We expect that, say, a recording of Lataji singing at last year's Onam fest (?? !! ) at the Tagore Hall should, when played back, project a convincing 'make-believe' sound image as we listen to it in our living room. Had you been there at last year's 'live' event, you would have some ready 'reference' for judging the reproduction and its fidelity. If not, you would be happy if the reproduction could re-create in your room at least some of the 'ambience' of the original venue, and would evoke in you more or less similar emotions as you would have experienced there. But then you do not expect your small room to be transformed into the huge Tagore Hall; still you expect the recording to preserve and reproduce some of the 'live' ambience of the original performance, including its emotional impact. Really a tall order!<br />
<br />
An interesting conundrum suggested by pundits with a sense of humour is the vexing question: What are you aiming for in your reproduction?<br />
<br />
Do YOU want to be THERE ?<br />
Or, is it that you want THEM to be HERE.<br />
<br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdmjgwFfAMLjdq4W_NVquSboMYs65JQd7xUrJOUyWH92vCxV7XSvMJZ_1LXXAWV8STTsdHajwL-xHjLfDndwnVtLS23ZdCz-0Tu1D7uDeNC8__SRZwCMefTo4Dzpd7l6akYdLk3CRbV7E/s1600/Royal+Albert+Hall.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdmjgwFfAMLjdq4W_NVquSboMYs65JQd7xUrJOUyWH92vCxV7XSvMJZ_1LXXAWV8STTsdHajwL-xHjLfDndwnVtLS23ZdCz-0Tu1D7uDeNC8__SRZwCMefTo4Dzpd7l6akYdLk3CRbV7E/s320/Royal+Albert+Hall.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">A concert in progress inside the Royal Albert Hall, London</td></tr>
</tbody></table>In other words, when you play, say, that landmark concert by Lata Mangeshkar and team at London's prestigious Royal Albert Hall, <<<a href="http://en.wikipedia.org/wiki/Royal_Albert_Hall">http://en.wikipedia.org/wiki/Royal_Albert_Hall</a> >> do YOU want to be 'transported' to the original venue, experiencing in full the sweet acoustics of the famous concert hall, the 'presence' that is there at every live concert, and of course, the emotional impact of the great moment--all the while sitting comfortably in your couch in your own room.<br />
<br />
Or, do you want the reproduction equipment to 'transport' India's sweet Nightingale and her troupe and all the rest HERE to your smallish room, with its very ordinary acoustics: the ticking of the clock, the faint sounds of traffic in the road outside, the sound of water running in the adjacent bathroom, and the sound of the TV from the other room intruding into your reverie.<br />
<br />
You might say, I would rather be 'there' in the concert hall. But it is not easy. What you are having right now as your sound system plays is a weak attempt at bringing 'them' 'here' into your room. Are you sure? Or do you find that at times you suspect you are 'there'? This philosophical conundrum probably will never have a true resolution at least with existing technology. Why?<br />
<br />
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HEARING IS BELIEVING<br />
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To answer that we have to look at the basics of our hearing mechanism.<br />
We all say 'hearing is believing'; really, is it so? Ah, then how do you hear? If you think you hear with your two ears, let me tell you, you may be right, but you are more likely to be wrong there! Truly, we 'hear' with what is in between those ears--our complex brain. The ear-brain combo has developed in a particular manner over the millennia when man has evolved from a creature dodging the predators in the primeval jungles, to being a predator himself in the concrete jungles of the modern metropolis. Scientists are only now beginning to understand how we hear with the ear-brain combo.<br />
<br />
There are powerful hearing-related mechanisms at work in our brains that have to be understood at a basic, simplified level if we are to understand the limitations of the reproduction chain in our homes--our stereo music systems.<br />
<br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiKUtdE_uNo501sFIIbO-mhJlmf_n9k3bpVfG0MHsaIlsHtJKO6QIjzX8tcQjQRrxfbaIh-Si-sb096yIxAWkUbqHaWL6pAkw_a0Q4t_N3dPd__XQkifWA3i-roG20iahnO6HOvYI_nQU/s1600/hunter.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiKUtdE_uNo501sFIIbO-mhJlmf_n9k3bpVfG0MHsaIlsHtJKO6QIjzX8tcQjQRrxfbaIh-Si-sb096yIxAWkUbqHaWL6pAkw_a0Q4t_N3dPd__XQkifWA3i-roG20iahnO6HOvYI_nQU/s1600/hunter.jpg" /></a></div><br />
Imagine our great, great, great.....great-grandfather in the vast plains of the ancient jungles. It is open ground with tall grass and trees and far away hills. Small sounds carry far, and what assail his ears is a mix of wind noise and the rustle of grass and leaves, sounds of a gurgling stream, punctuated by bird and animal sounds of all sorts. If you take a sound meter and measure the cacophony, it will be very loud most of the times. But suddenly there is the distinct sound of crunching gravel and the man is alert, his eyes focussing instinctively towards from where the sound came, probably from a large dangerous animal. This particular sound may not have registered at all on the sound meter, mind you, being so faint in comparison to the sum-total of all the other sounds! Then how did this miracle of hearing take place?<br />
<br />
As he stood there in the open plain, the lack of echoes and other auditory clues told the man about the vast open nature of his environment. Though the background sounds were 'loud' to the sound meter, his brain told him to ignore it as they were just that--a background 'curtain of sound'. But when something totally new, faint though it was, intruded, the two ears immediately fed some information to the brain that did an 'on-the-fly' processing and gave the man the precise 3-dimensional point from where the threat came, and in an instant, he was ready, his fingers pulling taut the bowstring.<br />
<br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjElORwngmM-stPC6VMHfalJisqTYLynuJ-d0UV9ZRl3ikbytIXODOWKwIu2m6Zhc_SUwwK6v3nBPGwINGjnhdINiYgviiiSU-Q_nHRdZqZRJarIW1Yx_yRYvWtaYC1qflbQuxuhU07Wdk/s1600/cave+scene.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="214" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjElORwngmM-stPC6VMHfalJisqTYLynuJ-d0UV9ZRl3ikbytIXODOWKwIu2m6Zhc_SUwwK6v3nBPGwINGjnhdINiYgviiiSU-Q_nHRdZqZRJarIW1Yx_yRYvWtaYC1qflbQuxuhU07Wdk/s320/cave+scene.jpg" width="320" /></a></div><br />
When in the evening he moved to a more 'closed' environment like his cave, with its 'intimate acoustics', populated by his chattering wife and kids and maybe a dog or two, the situation was slightly different. There were many echoes or rather, reflections, from the cave walls etc. This gave him an 'instinctive' appraisal of its size and other qualities, while at the same time his brain processed the sounds in such a way that this 'thick soup' of original sounds and reflections did not confuse him at all. He could follow his wife as she walked back and forth doing the chores while talking to him, the older children playing (there was no home work in those days!) and the dogs taking it easy. But a faint whimper from the baby would alert him, and if his 'better half' did not respond suitably, he would shout at her, probably waking the baby fully and making it bawl loudly, adding to the confusing 'acoustics'! ( Feminists need not worry too much about this 'homely' scenario. In the early 'hunting' days, it was the male who did that risky business. The female was content to let the male bring home the bacon! How the modern urban changes have altered everything, except perhaps the acoustics of the average home! Oops, I forgot the 'yakking' TV, that icon of modern 'civilization'...)<br />
<br />
You can experience the confusing 'thick soup of reflections' by trying the following experiment. With your finger close one ear and listen with the other while being in an open space. Then slowly walk into the living room. You won't be able to bear the cacophonous assault of reflections on your ears! This is a good demo of how much of what the two ears 'hear' are selectively filtered out and even ignored by the brain in the interests of intelligibility and accurate 3-dimensional hearing. You might also have noticed that listening with one ear took away the ‘life’ of the sound image. Another related curiosity is the mechanism of the outer ear, or what the doctors call the pinna, which we pierce to put on all kinds of studs and decorations! Scientists have found that filling the contours of the outer ears slowly takes away the ability of the person to discern correctly sounds and directions. The more adventurous among you might even care to repeat that experiment!<br />
<br />
If you are keen to develop your ‘belief’ in your ear-brain combo, you must try the following experiment too. Remember, today we live in a world of 'visual overload' and so we often ignore the capabilities of our ears. After dark, go to a room, preferably one that you do not frequent all that often and pause at the door. Close your eyes, 'open your ears' and then slowly open the door. Just stand there and maybe shuffle your feet, and listen....and listen. You may not hear anything at first, but then slowly you discover that you have a pretty good idea of the size of the room! You take a step and you feel that you can sense how far away the opposite wall is. Blind people can hear the reflections clearly as they walk, immersed in the cacophony of our mad streets, and we see them easily dodging obstacles. The faculty is in all of us, only that it has 'rusted' with disuse. You can try this a few times and discover how adept you become at 'judging' strange rooms and halls without the help of visual clues. It is all very complex, though our brain handles it all adroitly and without our being aware of it.<br />
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So, that tells you one important thing: your recording and reproduction chain has to preserve most of these clues if they want to 'cheat' your ears into telling you that you are in the Albert Hall --when you are really in your small living room, or maybe taking a morning walk wearing your headphones.<br />
<br />
Can we have at least passable 'fidelity' in our homes? What can we do to 'improve' our experience of a recorded audio event?<br />
We will look at some of these interesting aspects in the coming posts.<br />
<br />
Till then remember to keep your ears open, and your brain switched on!<br />
<br />
------------------------------<br />
more to follow<br />
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<div><br />
</div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0tag:blogger.com,1999:blog-7571199246096728102.post-44644964055981040602010-09-28T06:05:00.000-07:002010-09-29T03:54:17.217-07:00Sound - 1-----------------------------------------------------<br />
THE SWEET SOUND OF MUSIC....<br />
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It is nearly fifty years since movie-going audiences worldwide were thrilled by the musical 'The Sound of Music'. Despite the wide cultural gaps and a Euro-centric theme, the movie gained acceptance the world over largely on the strength of just one thing-- music. No wonder the studios are planning to cash in on its timeless appeal by releasing a Blue-ray disc on its 45th anniversary this year.<br />
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<<http://culturemob.com/blog/the-sound-of-music-50th-anniversary-concert-today-with-theodore-bikel-and-kate-baldwin >><br />
<< <a href="http://www.deadline.com/2010/09/sound-of-music-45th-anniversary-theatrical-sing-a-long-oprah-show-collectors-dvds/">http://www.deadline.com/2010/09/sound-of-music-45th-anniversary-theatrical-sing-a-long-oprah-show-collectors-dvds/</a> >><br />
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Young or old, male or female, white or black or yellow or red or green....(ha, ha, ha, people come in so many colours! ) ...music is the one thread that unites us all. I trust we are in agreement there.<br />
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And wasn't it Shakespeare who made Orsino, the lovelorn Duke in Twelfth Night, say:<br />
"If music be the food of love, play on...give me excess of it...."<br />
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We all, lovelorn or not, love music. Period!<br />
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How could you be so sure?<br />
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<div style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">-----------------------------------------------------</div><div style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">THE SWEET SOUND OF MONEY....</div><div style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px;">-----------------------------------------------------</div><br />
Look at the prices of hi-fi equipment and look at the smug smiles on the faces of the audio equipment designers-- that is the barometer of mankind's love of music. Spending money on good sound is as old as man.... I mean as old as since when 'good sound' could be had for money! Taking a look at the 'high-end' audio equipment scene today (and being shocked and dazzled by the stratospheric prices!) would take one whole post. Still here is a taste of the 'exotic'!<br />
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Six feet tall + half a ton + 20,000 watts. Is that a teraflop supercomputer or a 'humble' audio amplifier?<br />
<div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7wVYuuUk6j_oAe99L2zUO4UWm0aM5Zu1amJ4AgJqQ3Vdw_BCqUqMLAXkaOUQRrf0SInH0GZth55dgzWmtj7dNnkNx937IKBbQDCaFBy2Ndd11HY6UyJ4Cqj_sPsfRfn8MY9fVseFLfO4/s1600/Pivetta-Opera.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="238" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7wVYuuUk6j_oAe99L2zUO4UWm0aM5Zu1amJ4AgJqQ3Vdw_BCqUqMLAXkaOUQRrf0SInH0GZth55dgzWmtj7dNnkNx937IKBbQDCaFBy2Ndd11HY6UyJ4Cqj_sPsfRfn8MY9fVseFLfO4/s320/Pivetta-Opera.jpg" width="320" /></a></div><br />
Time machine or a work of modern art? Recognize a loudspeaker?!!<br />
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Call that a CD player? How dare you?!!<br />
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Truly 'high-end' amplifiers: << http://www.higherfi.com/audio_amps/1 >><br />
'Money no object' speakers: << http://www.higherfi.com/audio_speakers/1 >><br />
'State-of-the-art' digital gear: << http://www.higherfi.com/audio_digital/1 >><br />
'Interconnects'--that is 'cables' for us: << http://www.higherfi.com/cables/1 >><br />
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This is ONLY a sampling, the tip of the iceberg, so to speak. High-end audio is what can make even the 'super rich' quake in their shoes and go weak in their knees when they focus on the price tag! Ah, but then what is money when you love music..... ;-)<br />
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more to follow<br />
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</div>The Profhttp://www.blogger.com/profile/10279313433963145948noreply@blogger.com0