Fourier demonstrates that *any* waveform, including music, can be
represented as a series of superimposed sinewaves. Hence, Nyquist and
Shannon are correct in their postulations. While music may not *appear*
to be sinewaves, it can be so treated for the purposes of reproduction.
Bottom line of course is that digital audio works, and reproduces music
more accurately than any other system.


And after going through any compression, other than lossless (FLAC or
APE), makes the whoke kit-and-kaboodle math moot.

CDs don't use compression (mp3 sort or the sort of thing
done by radio stations). The sample frequency and bit depth
was chosen such that the errors fall outside normal human
hearing ability.