I just bought a new motherboard that has SP/DIF out (shaped like a RCA plug). I want to know if i can use a normal RCA cable to plug my computer spdif out into a audio/video controller (that my step dad has) with caox in. And then use the 5.1 RCA out on the controller and send it to my subwoofer with RCA in and get 5.1 surround? Will the controller convert the digital signal from the spdif into the 5.1 that can't read digital signal? If not will this work with my optical out thats on my video card? Any help is appreciated.
PS. The A/V controller thing is pretty nice and high end, tons of connections and crap.