An Echo in the Audio track is most often caused by using a computer that has a built in Microphone or Mic attrached and the Soundcard's Record Properties are set with the Mic turned on. Muting the Audio will stop you from hearing that, but the problem is still there. Go to your sound device's Control Panel and if it is a Windows built in sound device, use the Options menu to select Properties and then select Record Properties o view the Record Mixer and Mute the MIC input.


--Mac