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Originally Posted by AAR.oner
werd ssamadhi, a bit more re: side channel?
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Basically the difference of the two stereo channels. You can store stereo audio in the classical L-R (left-right) representation or in M-S (mid-side). [M = (L+R) / 2, S = (L-R) / 2]
Lossy encoders often introduce strong artifacts in the side channel, intentionally or not, since it's not something that's usually directly related to perceived audio quality (unless surround is being faked based on side channel information, for example by Pro Logic decoding)
You can listen to the side channel for example by using Audition's channel mixer (L-R to Mid-Side preset, or alternatively Vocal Cut)
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