On Tue, 21 Jul 2015 18:43:51 +0000, Fons Adriaensen wrote :
> On Mon, Jul 20, 2015 at 09:23:16PM +0530, umashankar manthravadi
> wrote:
> 
> > The other is an eight channel microphone
> > that I will ship to angelo, hoping he will develop a calibration
> > process to create 9 channel second order recordings.
> 
> You can't create 9 independent signals out of 8 inputs.

Refering to :

http://www.ambisonic.net/pdf/CotterellThesis/Chapter_6.pdf

and: (fig. 3)
http://decoy.iki.fi/dsound/ambisonic/motherlode/source/Periphony_With-height_sound_reproduction_Michael%20Gerzon_JAES_Jan_Feb_1973.pdf

Is twelve capsules the minimum required for a HOA microphone?

--
Marc
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