24 Feb
2009
24 Feb
'09
11:06 p.m.
Le lundi 23 février 2009 à 23:02 +0100, yohannes a écrit :
hello everybody,
maybe sounds absurd:
is it possible to cancel an whole signal of an mic input through phase-canceling?
if yes, how can i do dat in pd?
Hi yohannes,
maybe you are looking for something like an acoustic echo canceller. Speex has one:
http://www.speex.org/docs/manual/speex-manual/node4.html#SECTION004500000000...
maec~.c is a more than ugly very first attempt for an external quickly written to give speex a try. I had quite good results, close to 20dB rejection, with only one micro and only one speaker. Rejection is close to nothing with 2 speakers. As I need a good rejection with 5 speakers I gave up.
All the best, Joël