HDMI input switching
My setup currently has an AppleTV going to a receiver via HDMI, which is then connected to a TV via HDMI with ARC. Normally this setup works great. I can watch content on the TV and it will send audio over the HDMI ARC to use the receiver for sound. Or, I can stream to the AppleTV through the receiver and the TV will automatically change inputs to view the content and use the receiver for sound. I'd like to maintain this ability as one mode of operation.
Now, what I'd like to also do is to sometimes stream to the AppleTV and display on the TV, but use the TV speakers for sound instead of the receiver. Then, separately stream music to the receiver. I was hoping to just do something simple like get a second AppleTV and connect it directly to the TV for this purpose. The problem is that as soon as the TV plays this input, the TV sends the audio over the ARC back to the receiver which automatically changes inputs from the music to the TV output. To get it to work I need to also disconnect the HDMI ARC cable between the TV and receiver. I don't want to disable the automatic HDMI input switching on either the TV or receiver, so we don't have to manually change inputs for day-to-day use. How can I get this setup to work in both modes (using two different Apple TVs is fine) without needing to connect and disconnect the HDMI ARC cable each time?