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From: eethomas@cybaswan.UUCP (Andrew Thomas)
Newsgroups: comp.music
Subject: Re: What is "QSOUND"
Message-ID: <2430@cybaswan.UUCP>
Date: 5 Apr 91 16:33:05 GMT
References: <91090.130526AARIE@BGUVM.BITNET> <1991Mar31.214440.19139@dgbt.doc.ca> <1991Apr2.114107.1@dev8.mdcbbs.com> <1433@qusunc.queensu.CA> <32445@mimsy.umd.edu>
Reply-To: eethomas@cybaswan.UUCP (Andrew Thomas)
Organization: Dept. of Elec. Eng., Swansea University, UK
Lines: 25

In article <32445@mimsy.umd.edu> ogata@leviathan.cs.umd.edu (Jefferson Ogata) writes:
>Common mixing boards provide pan controls for adjusting the relative
>amplitude, but it is a major pain to try to introduce the delay, and
>the actual delay time should vary according to the listener's speaker
>placement and location. So as far as I know, no one's ever gone to the
>trouble before to put in channel delays for panning effect. This is
>effectively what Qsound is doing, if I understand the original poster
>correctly.
>--
>Jefferson Ogata        	        ogata@cs.umd.edu
>University Of Maryland          Department of Computer Science

Yes, you're quite right. And it was all demonstrated on UK television
recently. The whole system is contained in a rather smart white box about the
size of a briefcase. Dials on the box can be turned to move the position of
instruments to the edge of the normal stereo pan, and then beyond. You're
quite right about the phase delay.
      As for the acoustic room with speakers and mikes, I don't know
where the person who mentioned it saw it, but I find it extremely hard to
believe. If this is an alternative system it's got no chance. The method I
saw was much more sophisticated. I believe an earlier posting mentioned
something about simulating phase shifts, which sounds more like it.

Andrew Thomas
eethomas@pyr.swan.ac.uk