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Good afternoon,

In the cinema room I have two play 5, the sound bar arc and the sub, connected by Wi-Fi to each other and to an Apple TV. 
The Apple TV is connected to a projector via hdmi. 
When I switch on the system, the sound does not work on the sonos system, assuming the sound output of the projector. 
Only when I restart the Apple TV and select the output (cinema room) am I able to turn on the Sonos system. 
How should I make the connection correctly?

The Arc should be connected to the projector’s HDMI ARC or optical port. The Apple TV is also connected to one of the projector’s HDMI ports.


Thank you!