[Top] [All Lists]

RE: Questions for audio gurus

Subject: RE: Questions for audio gurus
From: "Don Lloyd" <>
Date: Wed, 22 Feb 2006 18:07:34 -0800
Julius Thyssen wrote:

As the Whittaker-Nyquist-Kotelnikov-Shannon sampling theorem states;
When sampling a band-limited signal (e.g., converting from an
analogue signal to digital), the sampling frequency must be
greater than twice the input signal bandwidth in order to be able
to reconstruct the original perfectly from the sampled version.

I'm not sure I understand this here Nyquist limit. Wouldn't the sampling
frequency have to be _much_ greater than twice the highest frequency being
recorded? F'rinstance, say you want to record a 22.05KHz sine wave. The bes=
you could do with a 44.1KHz sample rate is a 22.05KHz square wave,
regardless of bit depth. The quantitative frequency would be present, but i=
a considerably altered shape. Seems like the minimum sample rate would have
to be, oh, say, 5,644.8KHz.

-- Don


<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU