I have a Creative X-Fi XtremeMusic in my media center PC running Windows 7 Pro x64. The digital I/O connection is connected to a Denon receiver.
Under Vista, I was able to watch DVDs in Media Center and have the receiver decode either Dolby Digital or DTS sound (verified by the receiver display indicating Dolby Digital/DTS). Now under Windows 7, I can't seem to get the same functionality. The receiver display always says "Dolby Pro Logic" and never switches to Dolby Digital or DTS. When I go into the Sounds Properties in Control Panel and look at the S/PDIF output properties page and test the supported formats, both Dolby Digital and DTS work (as verified by the receiver display changing). In Media Center, I've verified that "Auto Volume" is off.
I'm using driver version 2.18.0013 from Creative's website.
Does anyone have any suggestions?