Hi I have the above TV. I'm trying to hook up my PC to it via it's single HDMI port. I have bought a DVI->HDMI cable and picture comes thru fine. Now I want to put sound thru to the telly just as a stop-gap solution till I get a new hi-fi. The manual indicates there is one RCA port that can be connected to get sound on the HDMI/DVI channel. What I don't understand is why is there just one port? Is it Mono sound? Or is it a SPDIF input?