Just added 5.1 surround system. Xfinity Box connects to AVR with HDMI cable. Video then goes to TV from AVR via HDMI. What do I need to do to get surround audio when watching TV or On Demand movies?
the ARC is 'out from TV' to the receiver. hook the STB to the HDMI1 or HDMI2 (see TV owner's manual). then connect ARC out on the TV to the ARC in on the receiver. use the TV's audio menu to adjust lip sync if necessary.