I was hoping I wouldn't have to come here to ask as I'm ALWAYS good at figuring out little computer/home theater problems myself but this one is just bugging me up the wall. I'll give as many details as I can here that may be needed...

Computer setup: Dell XPS 400 with a Sound Blaster X-Fi Xtreme Gamer card. I put this card in myself about a month ago because it has a Digital output.

Receiver is an Onkyo TX-SR605. I have video successfully outputting from the video card to my "HDMI 2" port on the receiver. As for the audio, I have a optical to coax converter coming out of the sound card and into the "Tape In" ports on the back of the receiver. Now, I have the assignable location of "HDMI 2" set to "Aux" ... I'm not sure how to explain this, but does this mean that since the video and audio are coming from two seperate locations, I can only have one or the other? Not like this is really making any difference anyways, because there's no audio no matter how I try to figure it out.

Back on the computer, I load up the "THX Setup Console" and the area that says "Flexi-jack mode" with the Digital I/O option is disabled (grayed out), so I'm assuming it's a problem on the computers end, and I can't for the life of me figure out how to enable this option. I've looked everywhere. Has anybody else gotten their X-Fi to work on their home theater?

As for the audio, I have a optical to coax converter coming out of the sound card and into the "Tape In" ports on the back of the receiver.

This sounds like a problem. You cannot connect a digital output (either optical or coax) to an analog input (like Tape IN, CD or Aux). You need to connect to a digital input on the receiver.

My apologies...the cable is a digital optical (the little headphone type jack) to analog (the white/red combo jack thingy) ...typo. :D

My apologies...the cable is a digital optical (the little headphone type jack) to analog (the white/red combo jack thingy) ...typo.

My apologies...the cable is a digital optical (the little headphone type jack) to analog (the white/red combo jack thingy) ...typo. :D

That's still a digital connection. The output is not optical, it's coaxial.

Another thing you'll want to check is that the card is actually outputting sound through the digital connection. Some cards use a connector to double as a digital out and another 2-channel analog out, and the card has to be set to output digital audio instead of analog audio. Go through the options for the sound card and make sure any digital output options are checked, and that the S/PDIF output is not muted.

BTW, do you have two accounts? ;)

Oh, another thing. The receiver cannot take another digital audio source and combine that with HDMI video; the audio must come from the same HDMI source. So, your setup won't work anyway.

What you'll need to do is connect a cable from the coaxial digital out on the sound card to a connector on the video card, so that it can send the audio over its HDMI output. Your video card should have came with this connector (mine did).

The only other way to do this is to send the HDMI video straight to the TV and the digital audio to the receiver.

I chose to go the analog route when connecting my X-fi to my onkyo 705.