Klarinet Archive - Posting 000486.txt from 2001/02

From: George Kidder <gkidder@-----.org>
Subj: Re: [kl] Difference Tones
Date: Tue, 13 Feb 2001 08:20:18 -0500

I doubt if the microphone is linear, especially at that low a frequency.
This might be all the nonlinearity you need for the recording. Of course,
something else would have to account for the perception of the live
audience - and this could be their ears' non-linearity. Or the walls, or
other pipes, or the rector, or whatever.

At 12:21 AM 02/13/2001 +0000, you wrote:

>> The waves in the grooves on the LP disc (recorded
>> digitally, but cut on an analog disc in 1979) on a separate sample 8
>> Hz CCCCC can be clearly SEEN on the vinyl with the naked eye. That's
>> why I am having so much trouble with this "perception" thing, even
>> though I doubt that my stereo does the recording any justice at all.
>
>Well, I don't understand this. The only thing I can think of at the
>moment is that the walls or other parts of the Cathedral respond
>non-linearly, and thus generate heterodyne frequencies that are then
>recorded by the microphones, in the same way that the inner ear responds
>non-linearly, and generates our perceptions of difference tones.
>
>I'll ask around.
>
>Tony
>--
>_________ Tony Pay
> |ony:-) 79 Southmoor Rd Tony@-----.uk
> | |ay Oxford OX2 6RE GMN artist: http://www.gmn.com
> tel/fax 01865 553339
>
>... Divers do it deeper.
>
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-----------------------
George Kidder
MDIBL
gkidder@-----.org

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