[opensource-dev] 3D soound

[Lee ponzu]

I saw this cool demo of 3D sound.  This is totally different from the SL
Voice technology, and I think it would compliment it perfectly.

Take a look...

http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=princeton+3D+sound

The basic idea is that stereo gives a weak illusion of 3D.  You have the
left signal, ls, and the right signal, rs.  A filter computes

rs_new = rs - ls
ls_new = ls - rs

and then play rs_new and ls_new.  (Details left as an exercise...)

In English---when you record in stereo, you record cross talk between the
mics which is recreated when you play back.  This idea removes the cross
talk, and dramatically increases the 3D illusion.  It is a simple filter and
works totally at playback time on all sound sources and any stereo
recording.  It would be easy to add it to the viewer...

Just an idea.
ponzu
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