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In Reply to: RE: "just raw PCM samples" posted by Quiet Earth on May 20, 2008 at 15:03:42
We can all agree that some changes to the PCM samples will change the sound. (Otherwise we wouldn't be able to tell the difference between Beethoven and Beatles.) On the other hand, most people would agree with me that changing a low order bit in a single sample of a loud section of music will not make an audible difference, everything else being kept the same.
Where the disagreement starts is when the low order bit in many samples starts changing (e.g. dither issues) or where different filtering techniques are used to convert the original bits into a continuous analog waveform. Disagreement gets more intense when discussing whether there are audible side effects of various implementation techniques, e.g. caused by motors, power supplies, or software. (This includes the difference between playing AIFF and WAV files, where on a given system it may be necessary to do a byte swap when playing one format but not the other.)
There are even people who believe that other possibilities exist for influencing the sound that aren't covered by these categories, but until I can find a better way of understanding what these people are saying I personally don't find their remarks useful. Perhaps in the future they will be better able to articulate their points or I will be more receptive to their statements, perhaps goaded by a few sensory experiences that do not fit my present model of reality.
Tony Lauck
"Perception, inference and authority are the valid sources of knowledge" - P.R. Sarkar
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