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+ - The sound of perceptual transparency? 1

Submitted by andhar
andhar (194607) writes "I hate audiophile audio and mp3 audio almost equally, though for different reasons. I was sitting contemplating lossy audio compression and the concept that you can throw away data and have the result be perceived just like the original — perceptual transparency. I then wondered to myself, is there a sound of the data thrown away? I.e. the sound of that which is not perceived.

Does anyone know how this would be calculated or even if there are any examples of this posted on the interwebs somewhere?"
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The sound of perceptual transparency?

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  • If you want to know what your mp3 encoder thinks you cannot hear you have to make an inverse filter. This is done by the original file and the newly created file and results a filter characteristic. If your intention is just to hear what you lost, you could subtract the newly created signal from your old signal but this is only a differential and not really telling you what lacks only how the filter/encoder performed. If you want to toy with this, I suggest go to, and download a nifty program that

Take your work seriously but never take yourself seriously; and do not take what happens either to yourself or your work seriously. -- Booth Tarkington