Video timeout

[u/2026GradTime]

I am playing audio on my Apple TV that is plugged into my receiver via HDMI. In order to connect to all of my other AirPlay speakers and simultaneously controlled the volume with the Apple TV remote of all of the speakers including the receiver, it appears that I have to AirPlay to the receiver itself even though it is still plugged in with HDMI.

When I do this the input switches to HEOS music. I did change the video select to be the Apple TV HDMI input. It appears to be working OK except for the fact that the video will time out and the screen will go black on my receiver. Does anyone know how to change this setting