ATI 650 PCIE tuner video but no audio

[zxt]

Sorry to be such a noob and ask stupid questions, I have searched the forum and wiki, but I'll be dead by the time I get through it all so I figured I would tell you my troubles and take the flogging.

My goal is to watch and record over the air digital TV here in the US.

I installed an ATI 650 PCIE tuner on a Gigabyte 965P_DS3 motherboard with an Intel P965 chipset. I am also using a NVIDIA GeForce 8800 GTS video card and Sound Blaster X-Fi for audio. When I installed the tuner I used some drivers from the AMD website, as I had read on the web that a lot of people were having trouble with the software and drivers on the disc.
I am using windows XP Pro SP3.

I installed GB_PVR and the vcredist_x86.exe file.
I set up the channels using the DVB EPG Broadcast as the EPG source.
I am able to watch live TV, have done a manual recording, and can play them back. The video looks pretty good.
The problem is I have no audio, not in live, or play back. I have tried changing some of the selections on the playback tab, but nothing.
I am not getting any error boxes poping up or anything.

I suspect I missed installing something or neglected to check a checkbox somewhere, but I have not been able to find it.
Attached are my logs.
Any help would be appreciated.

[sub]

The missing audio would probably be resolved by installing an AC3 decoder, like 'AC3Filter'.

You dont have the DVB-EPG in the USA, so that EPG setting wont give you any EPG data.

[zxt]

The missing audio would probably be resolved by installing an AC3 decoder, like 'AC3Filter'.

Yep, that was it.
Thanks for your support.