My mom just purchased a Sony KV-34HS420 HD-ready TV. She also purchased a DVD home theater system from Sony (HT-6900DP). What audio connections do I need to make from the receiver to the TV so I can hear the surround sound speakers while watching tv? I already have the DVD system and surround speakers working. Also, what do I need to set the receiver to (i.e. Video 1, Video 2, etc.) to hear the surround speakers as well. Thanks in advance.