David,
I've also got an ambisonic visualizer plugin developed but not published
. Aside from the kind of interface cleanup it would need for public
release, it uses what I eventually realized is a horribly inefficient
algorithm. I've mostly built it for my own testing purposes - to see
what my other plugins are doing. To that end I most often test using
simple tones, perhaps multiple tones or noise, panned with Bruces
Wiggins' plugins. I also built a little surround signal generator, but
I like to use other people software in there to guard against a
misunderstanding type bug that might be in generator, processor and
decoder where a common error might generate a correct result.
As to determining the direction of a sound from a soundfield recording,
I've read a bunch of papers and patents around this sort of thing and
it's certainly doable with caveats. Both the SIRR and Harpex decoders
do a determination of sound direction by direct solving of the
equations, used to build decoders. There are techniques, many from the
conference phone world, to determine where a sound is coming from using
non-ambisonic arrays, often used to point cameras. Then there are the
ways to track a sound once you know its source as Fons discussed. The
best way to go depends a lot on what your goals are.
David McGriffy
vvaudio.com
On 11/14/2013 6:12 PM, David Cindric wrote:
Well... It's not published yet :D I'm testing it. That's why I need that
software to determine sound direction and compare it with visualiser.
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