SickDave, on 06 February 2013 - 13:07, said:
Now this is where my lovely setup falls flat on its face...The surround sound only picks up 2 channel, Opening the sound settings on the computer and checking the properties of the Optical output I can only select 2chnl outputs.
This problem was my nemesis too for the longest time.
From my experience, the optical output can only pass-through an already existing multichannel sound - a stereo signal would always come out as stereo on my Pioneer Elite A/V no matter what I tried to do.
I solved the problem by installing Asus Xonar HDAV Deluxe card and by using the HDMI output specifically.
I can now play any stereo file on the PC and the Asus Xonar converts it on-the-fly to any multichannel format - DTS, Dolby, 5.1 or 7.1! - but it does so only with the HDMI output; using the optical cable, this card behaves as the others I owned before it.