[X3D-Public] potential free audio formats for X3D - ogg and flac
dave at realmofconcepts.com
Fri May 10 14:24:58 PDT 2013
On 5/10/2013 12:49 PM, Michalis Kamburelis wrote:
>>> X3D working group: we should also consider improving the aural
>>> spatialization model in next year's X3D v3.4.
I think it's high time we look at incorporating phase, aka
time-of-flight, into audio. Binaural or holographic sound is more a
matter of the timing between when one of your ears hears a sound before
the other, than of the loudness of that sound. With normal stereo
'spatialization' the sound can't sound further apart than the two
speakers you have (and multi-speaker systems are, IMHO a hack). But
phase-correct stereo, the sound may even have about the same loudness in
each ear, yet sound like it's coming from 'way over there' or 'up there'
or 'back there'.
I'm pretty sure many hardwares support this, and even if not, today's
processors can handle it. It's at least worth looking at. Even if the
typical PC is not up to it today, it will be by the time a spec is
A simple first step would just be to delay the waveform based on the
distance the audio source is from the current camera, +/- inter-ear
distance, plus some attenuation for the more-distant ear. Not too
different from stereo vision in concept.
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