> My question, again, is this: isn't resampling equivalent, except for there
> being no analog travel in the middle, to DAC+ADC?
no. resampling to a higher sampling rate (eg 32kHz->44.1, or 44.1->48) can
be done with almost no degradation of quality. assuming a sound with no
sound components above a certain threshold (eg for 44.1kHz audio, nothing
above 20kHz or so), the original wave can be almost perfectly modeled, so
that if you then resample it to 48kHz, the sound will be almost identical.
this is best done with a technique called "bandlimited interpolation".
similarly, if you have a 48kHz sound that also has no sounds above 20kHz
(eg it went through a lowpass filter before recording), that can be almost
perfectly downsampled to 44.1kHz.
while there is a signal degradation in theory, it is extremely minimal,
completely unlike passing through a dac->adc.
see http://ccrma-www.stanford.edu/~jos/resample/ for a detailed examination
of bandlimited interpolation.
peter
-----------------------------------------------------------------
To stop getting this list send a message containing just the word
"unsubscribe" to [EMAIL PROTECTED]
