I'm not the most tech-savvy and I had a question. So I just bought a new HD TV and it has three HDMI ports and all are in use. One for the cable box, one for the PS3, and one for the Blu-ray player/surround sound. I wanna use my surround sound for not only the Blu-ray player but for my cable and PS3 also. So in order to use my surround sound as the source of audio for everything wouldn't I just connect a digital optical audio cable from my surround sound to my TV itself? Then in theory wouldn't everything that's using the TV's built-audio (like the cable box and PS3) use the surround sound?