[linux-audio-dev] High-order Ambisonic coder/decoder in JACK/LDASPA?

[fons adriaensen]

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.  They are now planning to
> implement this, using either JACK or LADSPA.  
> 
> As I have some experience with linux audio, I got involved.  So I am 
> seeking some advice and answers here.  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.
AFAIK, nobody ever even worked out the equations for 4th order or above.


-- 
FA