I've been playing with my box for about 6 month now and have a strange problem with the DolbyDigital (DD) feature.
XBox 1.1 (with X2 lite)
Advanced AV Pack
Optical connection to Yamaha DD-receiver
In the ms-dash I set up the Audio with Surround=yes, DD=yes, DTS=yes! Everything worked fine (games, XBMP,...).
Approx. 3 weeks ago I wanted to play MK Deadly Alliance. I got no sound. So I checked the receicver, optical cable, AV-Pack,... everything seemed allright. I started XBMP, started a movie, the receiver switched to DolbyDigital and I had sound. Then I started MKDA again, the receiver switched to DD - but no sound. Then I connected the 2 RCA Audio-Out from the AV-pack to the TV and... sound was there.
Then I turned off the mod and started ms-dash. Inserted a game and started it... receiver turns on DD and... no sound (except TV).
Then in the setup I disabled DTS - same problem no matter if original game or from HD. Receiver switches to DD and no sound, TV plays sound.
Then I also disabled DD in the setup and... I had perfect sound coming out my receiver (still over the same optical cable) but only in Prologic.
I got a new AV-pack, same shit. By the way... at all times where DD was enabled, when watching a movie with XBMP the receiver switched to DD and I had sound, only those damn games didn't work.
Why does my DolbyDigital doesn't work anymore? Any suggestions out there? Please help