TV is connected to sound bar by digital optical cable, but it will not work. I can make sound bar work when connecting to other devices via RCA cables. The instructions say to change my device (tv) output to PCM format, but I've searched through the tv menu and can find no option for doing this. The only audio options I see are for changing to "standard" "movie" "music" etc.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic