On 2017-07-01, Stefan Schreiber wrote:
Nice paper - I think the reason people prefer loudspeakers to
headphone sin this case is to do with the HRTFs - over speakers
people get to use their own personal HRTFs (discounting phanotm
sources) whereas this isnt quite figured out yet for headphones,
I thought the same. But why should you "discount phantom sources"? Do
you pretend VBAP and DBAP don't work?
Not to mention the whole of ambisonic theory. What it recreates
especially at the first order POA limit is an *exceedingly* rarefied,
distributed source. Something almost impossible to recognize as anything
having to do with directional localisation, if you only look at
physically defined quantities at the sweet spot. The correspondence is
so slight, there's a whole literature saying low order, classical
ambisonic couldn't possibly work because of what this and that
microphone signal looks like.
Yet it does. Surprisingly well, even. Far from optimal, of course,
because it *does* have to do with so very few resources. But it still
works. The Makita localisation theory at its base, while amazingly
simplistic, does make rather good use of the physical resources POA has
at its disposal, and help optimize its -- once again rather limited --
linear decoding machinery well beyond what you'd expect of it.
Not unlike how Blumlein's panning ideas work with respect to stereo
phantom sources. Them bridging stereo into frontal ambisonic, and
eventually further... ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
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