Brand new multimedia system with ASUS M2NPV-VM motherboard with 2GB RAM and AMD Athlon 64 X2 3800+ 2GHZ CPU. Turtle Beach Montego DDL sound Card. Gigabyte GV-NX73T256P-RH GeForce 7300GT 256MB GDDR2 PCI Express x16 Video Card.
I am using both Dolby Digital test files and a home theater audio video test and setup DVD for doing the main sound setup so that I know I an using sources that have all 6 channels (5.1). Also the Nero application has an information feature that confirms the source has all channels. I have an optical connection between the computer and my Yamaha receive. My receiver shows the type of signal and number of channels it is getting on the front display.
All of the hardware is working. If I play a DVD using the PowerDVD application I get great Dolby Digital from my home theater sound system. So I know that the sound card and optical connections are working. If I play any DVD with any other application (Nero, Windows Media Player) I only get stereo sound indicated on the Yamaha front panel and no surround sound from the speakers. If I play any Dolby Digital Multimedia file from the hard drive using any application I also only get stereo output.
At this point I don’t know where I look for the problem. What part of the system is in control of the Dolby Digital signal (taking it from the DVD or file and sending it out the S/PDIF)? Is there any utilities available that will help in diagnosing this kind of problem? What else should I check?
Is there a good source of information on the internet that describes in detail how the Dolby Digital signal is taken from a file or DVD, processed and sent out the S/PDIF?
Thanks in advance for any help