Well I've been looking all over for answers, couldn't find any, and got this site off google.

I did just got a single 1/8 stereo connector jack to plug into the Audigy. The other end of the connector is a female RCA. I pluged my RCA cable into it and the other end into my speakers coax digital input. Nothing! Says no digital signal. Even when switching to the digital mode in the Audigy and trying the speaker check, no sound. Switch back over to analog (using the 3 analog jacks from the sound card to the speakers)and all is fine. So it seems I can't get digital to work at all.