dwc Wrote: 
> A coherent image depends upon the sound waves meeting your ears at the
> precise time for your brain to infer a distinct location of origin. 
> The more sources of sound, the harder it is to get that precision. 
> That's one reason some folks claim that speakers with fewer drivers
> (i.e. single-driver or two-way) can image better than three or four-way
> speakers.  Seeking to achieve this precision is  also the reason that
> some speaker manufacturers tilt their baffles so that the tweeter is
> set back from the woofer frame.  This puts the point of origin of the
> two speakers closer together, ensuring that sound from the woofer is
> not delayed in relation to sound from the tweeter when it reaches your
> ears.  Pat McGinty calls this "time coherence". 
> http://www.meadowlarkaudio.com/TC1.htm
> 
> Anyway, my point is that throwing more speakers into the mix will make
> it tougher to get that amazing 3-d image we get from a good stereo set.
> Most decent multi-channel processors let you enter the distance from
> listening position to each of the speakers you're running in an attempt
> to give you some control over synchronizing the sound at that position.
> 
> -Dan

Well, in principle many speakers are better.  After all, you could put
a mic on each instrument or sound source in the original recording, and
then play the music back with a speaker physically positioned in the
same way as the sound sources were during recording, and you'd have a
perfect soundstage :-).  I once read about such a set-up for piano
music, with one speaker for each couple of piano strings.

Of course, this obviously isn't practical for many reasons, one being
you'd have to re-arrange your speakers every time you listened to
someting different.  Still, I wonder whether future technology might
allow an amplifier to sense the position of each speaker (and perhaps
of the listener as well), and then dynamically adjust the output from
mulitiple speakers to best emulate the oiginal sound...


-- 
opaqueice
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