16 Dec
2005
16 Dec
'05
5:06 a.m.
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:
Then we won't be reinventing the wheel, at least, which is good to know.
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. 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