[opensource-dev] 3D soound

[Ricky]

The only thing is: IIRC, all non-media (sound effects from scripts or
collisions/etc and voice, but not parcel media or MOAP) sound sources
in SL are played back as mono.  You get 3D/stereo sounds because those
mono sounds are played in a virtual 3D space, with each sound
"located" at the object that is playing it.

This is a really cool idea, but it doesn't go well into games or SL
I'm afraid - solely due to the fact that sounds are doing much more
advanced tricks in such environments that result in stereo being lost
and then remade.

Thanks for the idea, I may use it in future projects of my own! (Just
not games! :D )
Ricky
Cron Stardust

On Tue, May 24, 2011 at 10:42 AM, Lee ponzu <lee.ponzu at gmail.com> wrote:
> 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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