Shatilov wroteThe PS3 is connected to the PC Monitor.
the T7900 doesn't have an Optical In . Sound is transferred via the sound card from Digital In to Analog Out.
I already have sound but it is stereo.
ok so you can't do anything about the t7900 no matter what it will receive/transmit analog audio signal , what you can do is buying digital surround sound and i don't think its cheap so either way its not worth it unless you buy 3d enabled tv + digital surround sound now that's a good move :D