In my current AV configuration, the 976 is used strictly for sound, via COAX and/or optical cables from the source devices (high-end Pioneer CD/SACD/DVD/DVD-A player; ISP cable box). All video is sent via HDMI cables directly to my 4K UHD 65" Samsung TV. Recently, I purchased a Roku streaming device which will be connected directly to the TV with HDMI cable. (Note: All HDMI cables fully support HDMI 2.0.) Since the Roku is a very simple device with 1 HDMI and 1 USB port, I would like to use 976/5000 surround sound system, instead of the wimpy TV speakers, and the only option appears to be HDMI (ARC).

Does any forum members have experience with this signal path? I'm particularly interested in whether the HDMI (ARC) path will supersede the COAX-connected audio paths. Thanks for our assistance