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RE: RE: Questions for audio gurus

Subject: RE: RE: Questions for audio gurus
From: "Don Lloyd" <>
Date: Thu, 23 Feb 2006 11:05:38 -0800
Tom Duff wrote:

If you add up a bunch of sinc functions, each delayed and
scaled according to your recorded samples, you will find,
after slogging through more math than either of us is probably
interested in, that you can indeed represent a 22.05 KHz
sine wave.

In fact, because 22.05 KHz is right on the hairy edge of what
the Nyquist thm says you can represent, its phase had better be
exactly right in order for the reconstruction to work.=A0 But for
any lower frequency, even 22.04999999 Khz, you can, regardless
of phase, exactly reconstruct the signal from its samples.

Thanks, Tom --

That 'splained a lot. Now that the brain cells containing remnants of high
school trig and precalc have been bestirred, I also recall the concept
behind the term "limit". I can now say "Nyquist limit" without feeling like
a total poseur.

-- Don


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