I'm using an AppleTV 4K and a Beam connected to my TVs HDMI ARC. When I start my Apple TV it choose to play the sound on Airplay 2 in on my Sonos One in the kitchen instead of just playing through HDMI. I've chosen HDMI as the default output on my ATV. Anyone got any sugestions?
Best answer by Ken_Griffiths
Bruce is correct, this is an Apple, not Sonos, issue.
Assuming you're using tvOS 13, goto Settings/Video and Audio/Audio Output and actually go into the device list itself, where you need to remove the check mark from your Kitchen Sonos One Speaker... you can play to more than one audio output from Apple TV and you obviously have more than one output selected. See example screenshot from my ATV.