This issue might be more complex than it seems. DVI will only pass certain audio streams, and there's not enough bandwidth available to pass certain higher resolution streams. If you're playing 24-bit, 48 KHz DVD audio (AC-3 compressed, 5.1 audio) - it should interleave and play back on HDMI TV just fine. If you're trying to play DTS-HD directly from a Blu-Ray, it probably WILL NOT play successfully over DVI. There's no dedicated pins for audio in DVI, and there's not enough bandwidth available for a full HD picture AND DTS-HD on the same wires, so it won't encode the audio stream at all.
Some more info about what exactly you're trying to play back might help!
2.1 audio no high definition...no blu ray
i know it should work. i think you want the cord coming out of your videocard to be DVI with an adapter to HDMI -> HDMI into TV...DVI doesn't have "pins" assigned to audio channels, the signal is interleaved with the video signal, and if the card detects the TV as being HDMI, then it should work...
when the cable is plugged into the TV, what does it register as in your monitor control panel/CCC ? maybe windows thinks its an "unknown pnp device" instead of a HDMI target, thus its not interleaving the signal...???
very interesting observation ....currently im using my VE248h Asus monitor and it detects it as Generic PNP monitor (the geforce read it as a Asus VE248h) i cant sem to find a driver for Win 7