Best answer by melvimbe
The only configuration you really need to do on your TV is enabling CEC control. The document below should help for your particular TV.
https://en.community.sonos.com/home-theater-228993/enabling-cec-on-your-tv-for-beam-6810049
System Settings Menu > Select Control Other Devices (CEC). > Turn on HDMI ARC. > Turn on System Audio Control.
Alternatively, go to System Settings Menu > Select Control Other Devices (CEC) > Turn on System Audio Control.