> You can hear so many unnecessarily rejected sounds. That accusation requires evidence based in psychoacoustics. Just because you can hear it in isolation doe

> You can hear so many unnecessarily rejected sounds. That accusation requires evidence based in psychoacoustics. Just because you can hear it in isolation doesn't mean you can hear it if it is added back to the host audio. For instance when some quiet sound that is masked by immediately preceding loud sound is removed, of course you can hear that quiet sound in isolation! Your hearing has something like 120 decibel dynamic range, or better. You can hear differences in the compressed audio. Nobody can claims that there's no degradation in quality. Artifacts are obvious. Much more so at lower bit rates, though. MP3 starts to sound quite good around 192 kbps. The removal of those components is necessary. It is necessary to the algorithm so that it can achieve compression. Also there's this issue. If we take a signal and apply some modest EQ to it. Say we boost the bass and treble and cut me a little bit. Or any other EQ profile. If we then level match the two signals and subtract them from the other, there will be a difference: some aspects of the original material will be recognizably heard. For instance the difference between a slightly treble cut signal and the original will be the treble. But the trouble was not completely cut from the original. What you're hearing in the difference is not something that was entirely removed.