Can I get surround output from my Audigy's SPDIF optical out?

[DreamThrall]

Here's the deal... I'm screwing around trying to hook my computer up to my home theater setup. I've got a DVD/5.1 Surround combo that only has RCA and Optical Digital (SPDIF) for audio inputs. I'm fairly sure one pair of RCA cables won't support any sort of surround - plus, the audigy would output that on 2 pairs anyways. So I'm trying to hook up the optical digital output from the platinum front panel card to the digital in on my dvd player. Problem is, I can't figure out how to get the surround sound. I've got 2 channels, and I'm not sure how the output should be encoded or even how to change that... should the DVD player be doing the surround decoding, or should my audigy? Why won't it let me hear anything other than left and right channels? WTF, mate?

 

[lePobz]

Audigy SPDIF = digital 5.1 output, surely. SPDIF is digital, and your home theatre doodah will take that digital signal and use it.

 

[DreamThrall]

I found this:

Link

but the instructions are wrong.. . I can't find where to disable the AC3 decoding....

 

[gulo]

should be in Surround Mixer - Speakers - Settings

 

[DreamThrall]

From the surround mixer, there's no plain "speaker" button or menu option, only a "speaker settings" button. This leads to a different screen than the screenshot they give in that link. It has a dropdown to select which speaker configuration, and an option for "digital output only", which is checked, and a speaker testing utility, but nothing about AC3 decoding.

 

[DreamThrall]

here's a screen of that window: