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Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

Nyquist Theorem is valid

That is, you only need to sample at twice the frequency you intend to reproduce to capture that frequency perfectly. And very, very few, mostly very, very young people can hear 20kHz much less higher. Thus the adequacy of the 44.1kHz Redbook standard.

However the trick part, I would surmise, has always been the filtering of frequencies above the maximum target frequency, (22kHz for Redbook), that are just noise. The advantage of high resolution is in this realm, i.e. it is easier to design filters with fewer artifacts, (such as phase shift or ringing), when the digital frequencies are higher to begin with.

I might suggest, as a non-expert, that advances in DAC design are almost entirely a matter of filtering with fewer artifacts. BTW, I'm extremely pleased with my Schiit Bifrost Multibit with its "closed form" filtering; the level of realism is astonishing, at least at that price point.




Dmitri Shostakovich



Edits: 11/19/15 11/19/15

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