Hey! I recently bought a soundbar, connected to the TV by an optical cable, for my grandparents, model - ln46b500p3f. For some reason, the soundbar plays audio from the Blu-ray player connected to the TV, but not audio from the TV when it's on regular antenna. I've read that you have to change the audio type to PCM on the TV, but I can't find it in the settings or TV Manual. Please feel free to respond!