Re: ambisonic

["leese_martin" leese_martin]

There is a complete list of commercial manufacturers of 
soundfield mics at the bottom of the Wikipedia article at:  
http://en.wikipedia.org/wiki/Soundfield_mic#External_links

There are only a few.  The link there for home build mics is 
temporarily unavailable.  These are listed on my website at:  
http://members.tripod.com/martin_leese/Ambisonic/

Scroll down to the "Elsewhere" section.  The problem with 
home built mics, and with the Oktava mentioned by Emanuele, 
is lack of calibration.  This is non-trivial, and you might 
want to seek help from the people on the sursound e-mailing 
list; visit:  
https://mail.music.vt.edu/mailman/listinfo/sursound

Sursound is where the Ambisonic crowd hangs out.

Regards,
Martin