Xref: utzoo rec.audio:8816 sci.electronics:4186
Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!portal!cup.portal.com!R_Tim_Coslet
From: R_Tim_Coslet@cup.portal.com
Newsgroups: rec.audio,sci.electronics
Subject: Re: Extracting Mono from Stereo
Message-ID: <10682@cup.portal.com>
Date: 31 Oct 88 00:51:31 GMT
Article-I.D.: cup.10682
References: <343@ivucsb.UUCP> <3902@homxc.UUCP> <353@ivucsb.UUCP>
Organization: The Portal System (TM)
Lines: 29

In artical <1988Oct29.234044.15343@utzoo.uucp>
		henry@utzoo.uucp (Henry Spencer) Writes:
>In article <353@ivucsb.UUCP> todd@ivucsb.UUCP (Todd Day) writes:
>>_The man wants to solve two equations for 3 unknowns:
>>...  Can't in general be done.
>>
>>Well, then, how come your ears solve that equation everytime you listen
>>to stereo?
>
>Note the words "in general".  Your brain (not your ears) applies quite a
>bit of processing power to make sense out of what it's hearing.  Once it
>has done so, it has enough extra information to solve the problem.  It
>couldn't do this for random input; the extra information is available
>only because the input "makes sense".  Duplicating this process with
>electronics doesn't sound easy to me.

Add to this the fact that even the brain ocasionally fails to correctly
solve this problem, and locate the sound source. This is particularly
true for sounds generated on the plane of points equidistant to both ears...

...you can't tell whether the sound is comming from infront, behind, above
or below you, in this case (unless you turn you head to get it off that
plane, or you see the source of the sound). Your electronic circuit won't
be able to "turn its head" to get this additional info.

                                        R. Tim Coslet

Usenet: R_Tim_Coslet@cup.portal.com
BIX:    r.tim_coslet