I do not own a Yamaha and cannot help with specific settings. But, for TV viewing, there are two types of audio - Dolby Digital 5.1 on most HD channels and stereo on most SD channels. You'll want to set the receiver to decode DD 5.1 sources. With stereo, I suggest using Pro Logic II, which takes a two channel input and expands it to fairly convincing 5.1. You should be able to configure the input from the TV so that the AVR knows to decode DD 5.1 sources and to apply PLII when the source is stereo. You'll set it up once and never need to worry about it again.