On 2010-12-03, Ronald C.F. Antony wrote:
How would the IR reverb have to be "optimized" for ambisonics? Convolution is convolution is convolution, right?
No, it ain't. Nobody does full 4x4 convolution; even the simplest case. We optimize both using simple statistics, and the more powerful psychoacoustics.
The key question is what IR files you feed the reverb as a basis to do its convolution, and these have to be made with ambisonics in mind, e.g. created from B-format recording of starter pistol shots, or equivalent synthetic B-format "events".
Which ever means you use, those files as well will be pretty much random. Not something you can simplify easily. So then you will have to employ some magic to make them easily computable -- or parallize neatly enough, which is also an option nowadays. We do have lots of cheap, low-power, low-heat, and fast-as-parallel-only workhorse going for us.
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