On 28/12/2013 23:25, Aaron Heller wrote:
Dick Duda and Ralph Algazi gave a talk and demo at a San Francisco AES
meeting at Dolby Labs a few years ago. At that time, they were recording
with a head-sized sphere with either 8 or 16 microphones around the
equator. They imagined that 8 would be used for teleconferencing and 16
for music recording.
The headphones used a Polhemus tracker to determine orientation. At low
frequencies, multiple mics were processed to produce the ear signals and at
high-frequencies (where spatial aliasing on the sphere becomes a
consideration) they simply selected the closest microphone to the each ear
location. Then generic pinna filtering was applied to improve front-back
discrimination. The immediate impression is the externalization and
solidity of the image.
There is some more recent material here:
http://www.ece.ucdavis.edu/binaural/
Despite the pedigree, it is not the sexiest ewe in the flock, although
it will turn a few heads..
The _binaural_ demos there don't work at all well for my ears, so I can
see why they might want to try MTB.
Dick was very helpful to me, more than a decade ago.
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