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Article #27

Re: Stereo separation of a mono signal

#27
From: Ed Hall
Date: Thu, 29 Oct 1992 11:57
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In article <1992Oct29.080645.2580@odin.corp.sgi.com> gints@prophet.esd.sgi.com (Gints Klimanis) writes:
>In article <3936@randvax.rand.org>, edhall@rand.org (Ed Hall) writes:
>|> Look in "Musical Application of Microprocessors," 2nd Ed. (by Hal
>|> Chamberlin, Hayden Books, 1985, ISBN 0-8104-5768-7) for some practical,
>|> non-mathematical material on the subject (and on stereo, too).  Some of
>
>The book is an excellent starter.  However, I remember the filter
>coefficient equations contained a chock full o' errors.

There are a few errors, including some typos which have been corrected
in the second edition.  Nothing which would lead someone too far astray.

BTW, although constant power panning is probably best for this
particular application, it is not the only "proper" way.  For example,
if the sounds are to be arranged in a /straight line/ in front of the
listener things get a bit more complicated; constant power moves the
apparent sound source in an arc.  There is nothing here which doesn't
fall out of some trig and the inverse square law, but I've heard more
than one recording where this simple fact seems to have been forgotten.

But in the teleconferencing case, a "round table" seems appropriate.
Thanks for correcting my oversimplification (which would create a bit
of a "hole in the middle").

		-Ed Hall
		edhall@rand.org
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Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!usc!randvax!edhall
From: edhall@rand.org (Ed Hall)
Newsgroups: comp.dsp
Subject: Re: Stereo separation of a mono signal
Message-ID: <3937@randvax.rand.org>
Date: 29 Oct 92 11:57:48 GMT
References: <dfrankow.720325401@myria> <3936@randvax.rand.org> <1992Oct29.080645.2580@odin.corp.sgi.com>
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