I'm running my Computer through my existing Home theater system.
Although, I'm wondering if there is a big difference when listening to music and playing games or watching movies and such between RCA/Optical.
I'm using the current Onboard sound, using the 3.5mm jack on the rear of my computer that divides in to the Two RCAs (twin phono) then goes in the the reciever.
I know the system can provide amazing sound, since the 7.1 receiver I'm using retailed for $999 last year, but I managed to swindle a guy on craigslist down to 60 bucks for it, lol. He was really desperate, and it's in flawless condition (used it for about 6-7 months, so I know it's working properly and not funked up).
and the speakers.. well, don't get me going on those /sigh.
So anyway, I know the theater can provide great sound, but is there really an improvement with a sound card? Is it worth it?
edit;
conflict between volumes I can answer.
That one is kinda shady.
Usually I just leave the Reciever [on the theater system] at about 70% of its max or so.
Then I control the sound through windows on my keyboard (Logitech G15).
That way if I want it really loud, I can have it.. or if I want it really quiet, I can have that too.
Since it's all done by %ages based on what is playing.