Klarinet Archive - Posting 000689.txt from 1997/11

From: Bill Hausmann <bhausman@-----.com>
Subj: Re: Nyquist and analog
Date: Wed, 19 Nov 1997 18:56:05 -0500

At 10:00 AM 11/19/97 -0800, Jerry Korten wrote:
>By definition, a sampling process that cannot represent a continous
>process. This is a fact. It is why the process is called sampling. The high
>frequency portion of the signal (which is filtered out to avoid aliasing)
>is not present on the recorded material when digitization occurs. This is
>the main reason that the harmonic structure on a CD does not match what the
>ear hears from a live performance or an analog recording.
>
Excuse me, but isn't the filtered high frequency portion (above 20 kHz)
exactly the part our ears *DON'T* hear from a live performance or an analog
recording?

Bill Hausmann bhausman@-----.com
451 Old Orchard Drive http://www.concentric.net/~bhausman
Essexville, MI 48732 http://members.wbs.net/homepages/z/o/o/zoot14.html

If you have to mic a saxophone, the rest of the band is too loud.