How can i get 5.1 surround sound from my TV? I have a LG blue ray player and it has only HDMI out and COAXIAL out. I connect blue ray player to the TV via HDMI cable. My sound bar system has only OPTICAL AUDIO input. TV has OPTICAL output, COAXIAL output and RCA output. How can i get 5.1 surround sound from my sound bar system?