> In the Resampling Audio Package, Julius O. Smith said
> "Any reasonable sampling rate can be converted to any other. (Note
> that, in this example, if you have obtained a direct-digital transfer
> from DAT or CD, you probably have some pre-emphasis filtering which
> should be canceled using a digital filter."
i dont believe this. if it came from analog tape, i can understand,
but this is almost totally pointless on a digital medium, as it should
not be any better at storing some frequencies than others.
also, i havent noticed any real difference in frequency spectrum
between ripped wav, playback via analog cable to sound card, and
playback via the jack on front of my cdrom. so, unless you have a card
with hardware eq on analog inputs, how are you even supposed to listen
properly on a computer?
> Another question is : which CD's or DAT's have pre-emphasis ?
i seem to remember that on cds at least, there are bits in one of the
sub-channels or something to indicate this. but i suspect the answer
to that question is "almost none".
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