Comment by Anechoic
14 years ago
44100 is not a bad sampling rate, but it necessitates very sharp aliasing filters,
When you're talking about recording, sure, but in terms of storage and playback, we solved that problem 20 years ago with oversampling.
You will still need a aliasing filter that cuts off between, say, 18 and 22.5 kHz to avoid aliasing noise. That is one sharp filter no matter how you look at it. You can use a high quality, long, linear-phase FIR filter, but you can't cheat physics: sharp filters necesserily introduce distortion, and such a sharp filter so close to the hearing threshold does not go unnoticed.
I don't see how a sharp filter could be needed if the DAC is oversampling.
Obviously. Analogue audio does not have a sampling rate. The ADC however can oversample all it wants, but if the output is 44.1 kHz, it needs an aliasing filter that cuts off at 22.05 kHz.
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