I want to build up a feedback / echo canceler or destroyer with PD for a "one-microphone-and-many-moving-speakers-in-a-room-concert-situation"

do you have any suggestions how to do that?

I'm trying the nmls~ object for adaptive filtering, but i'm not quite shure how to make a fedback destroyer out of it. Is that possible? can you give a link how?

or do you know other software solutions?
I found Speex at http://www.Speex.org
and OSLEC at http://www.rowetel.com/blog/?page_id=454
but I dont use Linux ... and OSLEC is for telecommunication only, isn't it?

I'd be very happy about every hint

thank you very much!