Hi on my Zotac Ion nvidia 9300 board, when I am going through the AV Wizard , after updating alsa to .23 , I hear regular audio (the classical piece), the 5.1 Audio, (The dramatic rumbling music) but when it goes to the DTS test, I get static. However I still answer "Yes I can hear it" and afterwards, my DTS audio dvd, and videos all work fine. I am not sure if the static is being produced by the HDMI from the motherboard, or the fact that my wiring is a bit unconventional.
I have an LG 50PV450 TV. The MD hooks up to it via HDMI to HDMI-1, and a fiber optic/toslink cable from the TV to my RCA STAV-4090 AV Reciever. I use the TV to switch between devices. So perhaps the TV is causing the static, and that is why I did not get silence.
But I can confirm, hookups as follows:
MD to HDMI 1 - DTS audio works fine
BluRay to HDMI3 - DTS audio works fine
Dish ViP611 HD-DVR to HDMI 2 - DTS audio works fine
Now when the TV is kicked on via USB-to-Serial-to-Null modem adapter, I can see for a brief second that the TV volume is automagically set to "0" zero. Not sure if that is required to send the Digital audio down the fiber optic cable or not.
But if you are getting silence, and you can see your "DTS" light or text come on on your reciever. I would re-run setup wizard and answer yes to the DTS question.