Really weird random thing happened to me today. I have a clip with audio. When I play that clip in the viewer, it is silent. But I can see the levels bouncing up and down in the audio meter. When I overwrite that clip into a sequence the audio plays back just fine in the sequence).
Also, yesterday when I was working with this clip in the viewer, the audio played just fine. I've restarted of course and probably spent a good 30 minutes trying to figure this out. I'm guessing I hit a keystroke somewhere?