trying to reduce phoco feedback echoes in conversations

Hi all, I was thinking about the solution that people is making to prevent feedback from his speakers to mic:

http://www.mp3car.com/vbulletin/show...&postcount=197
http://www.mp3car.com/vbulletin/show...&postcount=202

I´m testing I soft "Audio Zone Trigger", from http://www.zonetrigger.com , selecting listening from "mix audio" line, it can detect live output or silences from speakers line out and, by example, run a file or execute a hotkey.

My plan is create an Autoit .exe to mute mic for a short time (0,5 secs) and unmute again. Or in reverse if you detects silences, and run it from the soft... or maybe somebody knows how to program all this in a stand alone .exe.

Anyway
now I´m looking for a Autoit guru for develop this. Any idea??

Edit: If you select "mix audio" line for listen in this soft, phoco will use this line also in order to take mic input. One step backwards. Maybe using to soundcards (PCI + USB)...