[maxmsp] Re: (Ambisonics) methods for encoding A-Format to B-Format

Hi Julien,
My understanding is that the convolution is used to calibrate the signals from the capsules before matrixing, ensuring that the derived B-format is accurate. Check out this article by Angelo Farina.
http://pcfarina.eng.unipr.it/Public/B-format/A2B-conversion/A2B.htm
The people on the sursound list could answer your questions much better than I ever could.
https://mail.music.vt.edu/mailman/listinfo/sursound
cheers,
Jim