Yes I remember seeing this. But the Home TheaterSpeaker Guides, available on the Dolby website, clearly show the surrounds well below head height? So am I just being picky, or are they not the primary resource on this stuff!
I have my surrounds about 2ft above my head and 5ft either side as there is only about 2ft between the listeners head and the room back wall. This was set up many years ago and based on online recommendations (delocalise the sound) from online commercial sites IIRC. I was going to remount them on the wall in a lower position as one height channel will be installed soon. But am not sure this is best.
Yes, all components connected to the AVR with single HDMI to the TV.
When I am watching the the ATV, the TV has to be in AV input (ATV). When changing the Scene to TV with the AVR remote, the TV display stays on ATV and does not change to TV automatically and I have to manually change the TV input source to TV. Something must be set up wrong on the TV. My old AVR did not have ARC.