TheLastMan wrote:
> A sampling rate of 44.1khz will give you two pieces of information for
> each "wave" of a 20khz signal.  That is enough to encode, say, the peak
> and the trough of a sine wave, although it could, if badly timed, encode
> halfway up and halfway down - which would be no wave at all!

Sorry, this is incorrect. It would be true of a 22.05kHz signal, but not
of a 20kHz one. a 44.1kHz sample will properly capture all possible
20kHz signals.

See Nyquist and Shannon

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