On 07/19/2013 03:56 PM, Hector Centeno wrote:
Hi,
I'm trying to implement virtual microphones derived from first order
ambisonic soundfields using Csound. I was wondering if anyone had any
resources to share with equations that would allow me to achieve this,
specifying azimuth, elevation and directivity of the mic. I've been
analyzing Fons' code for Tetraproc (the Virtmic class) but I'm having
difficulties understanding some parts of it (but I'll keep trying). I found
the paper "Has Ambisonics Come of Age?" by Bruce Wiggins wich contains
equations for doing this but it seems that it only takes azimuth angle in
consideration.
if you want to play with equations and see what you're doing, gnuplot in
polar mode is nice. here's a plot i used to check my results of
converting three cardioids to horizontal b-format (before fons' plugin
was available): http://stackingdwarves.net/download/tricard.png
hth,
jörn
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT
http://stackingdwarves.net
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