Hello everyone, I am trying to set up my surround system from my computer, and so far am having little luck. It used to run off a set of three 1/8in cables, but I figured that optical is the way to go. Now, the system works this way - I have a Realtek AC97 ALC850 on-board sound "card" hooked up via an optical cable into my amp (Quest QSR5000 which fully supports a 5.1 system). The amp recognizes the availability of the 5 channels. All looks good, but once I do the testing (the sound "card" driver software provides me with individual channel testing) I only get the two front speakers. So the software sets up for 5 speakers (sub isnt working right now), and the amplifier receives the signal that 5 speakers are possible. Running the sound test on the amp, I made sure that all the speakers are working properly. And yet I actually get only stereo output. So, does anyone know what did I do wrong? And thanks!