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Subject: Re: [motm] Re: OT: Tales from an Audiophiles Crypt

From: Neil Bradley <nb@...>
Date: 2002-10-30

> The Nyquist criterion states that any sample rate of more than twice
> the highest frequency is all thats needed for accurate reproduction,

The Nyquist theorem never stated anything about accuracy, only that to
reproduce any given frequency, it must be at least half the sample rate.
If you sampled a 10khz sine wave at 20khz, it would become a square wave -
certainly NOT accurate. Most filtration in CD players would wind up
rounding the edges off anyway, but it's still not accurate - as compared
to the source.

> and I refuse to believe that there are that many engineers who can
> hear over 20 kHz. I sure can't now and I never could.

I hear people state this so often, but the higher sampling rate has
nothing to do with a desire to hear higher frequencies, but rather to keep
the higher frequency signals more true to the original.

-->Neil

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Neil Bradley In the land of the blind, the one eyed man is not
Synthcom Systems, Inc. king - he's a prisoner.
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