On Thu, Dec 15, 2005 at 08:33:34PM +0100, fons adriaensen wrote: > On Thu, Dec 15, 2005 at 04:56:04PM +0100, Asbjørn Sæbø wrote: > > > Some colleauges of mine do need a tool for coding and decoding of > > high-order Ambisonic for their research. They are aiming for seventh > > order, played back over sixteen loudspeakers. [...] > > The first thing I would like to > > know is: Does anything like this already exist? > > No, and for some very good reasons.
Then we won't be reinventing the wheel, at least, which is good to know. > Regardless of the JACK / LADSPA question, seventh order Ambisonics using > 16 speakers is just ridiculous. Either it's horizontal only, and in that > case using 7th order is just a waste of resources and effort (3th order > will do all you want), or it's 3-D, and it that case 7th order requires > *much* more than 16 speakers. Well, I don't know much about Ambisonics, so I won't take this discussion much further. But I note that my colleauge working on this is very much in disagreement with you. According to him, you theoretically need order 36 to achieve perfect wave front reconstruction in a sphere the size of a listeners head. (For a listener in the sweet spot and for frequencies up to about 22kHz, that is.) Asbjørn
