prevent echo when using phone through stereo
up vote 2 down vote favorite. 1. When I used Google voice to make a call, the other side informed me that he could hear his echo. The reason is that I was using my laptop's internal microphone as input and internal audio stereo as output for me, which could send back any sound played out by the internal stereo.s there any simple way to mute the microphone on my side when the other is speaking? I know I can click the microphone button of google talk, but just for quicker switch between mute and unmute, I wonder if there is a quicker way, such as a shortcut key or something? â Tim Mar 28 '12 at 21:56.