[PD] phase-canceling

Charles Henry czhenry at gmail.com
Tue Feb 24 01:19:12 CET 2009

Hi, yohannes

No, it's not absurd.  Tell us a little bit more about your
application.  I am out of the project game for now, but have some long
term goals for solving this sort of problem.

For example, you send a sound out your speakers.  You want to recieve
a new sound from the room on microphone that is not the sound coming
from the speakers.

This becomes a system identification problem.  You need to find the
delay between the speakers and microphone and the transfer function (a
filter) between speakers and mic.  Then, you digitally apply the
filter and delay to your signals as they would be played and subtract
that copy from the signal received by the mic.


On Mon, Feb 23, 2009 at 4:02 PM, yohannes <THIS_IS_POP at web.de> wrote:
> 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?
> thanks a lot, yohannes
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