I am needing help on this one in WinDVD 4+. Please don't tell me to try PowerDVD. It doesn't apear to like some of my SVCDs. The sound doesn't has so good quality on it. WinDVD 4+ gives me escelent sound on SVCDs.

The problem is that I don't get correct 5.1 decoding in Dolby Digital material (the center chanel apears to disapear or gets downmixed very bad to the fronts and rears at very low volume, I get like a bad 2 channel image on my 5.1 speakers and lost completly the LFE). This happens when I activate "Use hardware decode acceleration" Without this all content seems to play perfect. The thing is that without this WinDVD consumes 10% more CPU cycles and I think I can get the best quality using the acceleration of my video card.

I have XP pro and an Audigy player card. Have Geforce3 Ti200 from Gainward and an Athlon 1800+ with 512 RAM. Have last 29.42 official NVIDIA drivers and all the last drivers for my VIA chipset Asus board and last bioses.

I have selected 5.1 speakers in Windows as indicated in the Intervideo's FAQs, and have selected 5.1 on the Creative Surround Mixer. I have all the EAX disabled and have my speakers (Cambridge Megaworks 510D) connected to the SPIDF of the sound card (they don't have an external decoder, they permit just digital connection with the Audigy). I have selected 5.1 speakers in the WinDVD audio settings, no Dolby Prologic and no other effects.

Intervicdeo's support has been useless, they even don't answer my emails!

Thanks a lot for the help.