echo canceling

[GavinPeter]

audio echo always happens. i visit simplewebrtc, it seems gaincontroller is the key. But i dont figure out how to modify in the demo?

[sparkyish]

I'm not sure what the solution is, but this seems to be caused by something in the OS audio enhancements, refer to: https://code.google.com/p/webrtc/issues/detail?id=1261 -- I toggled my audio enhancements on/off a few times and got the echo to go away for a session, but it came back for the next.