Mac Pro :: No Sound When Playing DVD's - CD's Okay

Jun 4, 2012

how to trouble-shoot for audio when playing a DVD? I have had no problems with sound. I have been listening to itunes and Pandora all day. 

Here's the scoop: 

1. I burned a copy of a film screener (with permission). The video was fine, but it had no sound. (I have made a copy of this before and it was fine.) 

2. I tried another DVD of a music video. Again, the video was ok but not the audio. 

3. I tried a purchased movie DVD. The audio still didn't work (but video did). 

4.  I tried a CD and the audio and video worked. 

PS Not sure if this is important but thought I should mention:  For some reason, the video of the copied DVD kept popping up when I inserted the music video DVD. Once I restarted the computer, it played the correct DVD loaded in the player. 

Mac Pro, Mac OS X (10.6.8)

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