At some point between yesterday and today, the audio on my Quicktime audio just stopped working. I only have various .avi to test this out on. When I open the .avi file with mplayer of VLC, I get full audio, but it is muted for some reason on Quicktime. I'm not sure what else I can do other than verify that the volume meter is definitely on and maxed on on Quicktime. Anybody know what could be causing this? I'm running OSX.