Avocet wrote:
> Theoretically you can sample a 20KHz input at 44.1Ks/s, but it will
> only have two samples per cycle, so it won't give a sensible 20KHz
> back. With music, anything up there is hash, but wildlife calls need a
> better reproduction than that.
David,
Do you think that it was impossible to perfectly reconstruct such a 20 kHz =
sine signal out of a 44.1 ks/s recording?
I'm afraid that this issue is often poorly understood. Given that the anti-=
aliasing filter was sharp enough (in such a way that the 20 kHz is not bein=
g attenuated), then it should be possible to perfectly reconstruct the orig=
inal 20 kHz signal and play it back without introducing any distortion. Dig=
ital oversampling in the D/A converter circuit can help to create a very sm=
ooth analog output signal that is (almost) identical to the original analog=
input signal.
Regards,
Raimund
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