^^^^ Yes, I am wondering the same thing
The LCD model LN32C550 can play files mkv (H.264) HD and others from USB. I want to connect my TV (LN32C550) to a home theater (HT-TZ322) and get the sound in 5.1, connecting the devices through the optical cable TV (out) with HT(in). Could I get 5.1 sound through optical out when I'm playing from the USB a mkv file or similar?
If it's not possible to make this connection work , how could I harness the power of TV to play these formats from USB devices and get 5.1 sound in a home theater?