Are your output settings set correctly (include selected tracks)?
If you have more than 2 tracks of audio you may be causing issues in your final output try setting your audio output to “mix to 1+2”.
Check to make sure your export settings are correct.
What version of Avid Xpress Pro and Quicktime are you running? If you updated your itunes recently, you may have messed up your Quicktime integration.
John Kleber, ACSR Windows, Unity
Edit Operations Manager,
Black Entertainment Televsion
212-975-3312
john.kleber@bet.net