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Robbio
Enthusiast I
March 12, 2023
Answered

TV led Sound Out for ARC

I have an LG tv and a Sonos Beam in full surround sound config.

 

This forces the TV to change the Sound Out menu to “HDMI ARC”

 

When I change the Sound Out menu to “Internal TV Speaker” it immediately changes back to  “HDMI ARC”

 

This is not good for watching TV at night.

 

This means that the ARC signal is Sonos led. Is there a way for the ARC signal to be TV led?

 

 

 

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jgatie
jgatieAnswer
March 12, 2023

Turn off CEC (Simplink) before you switch to the internal speakers.

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8 replies

jgatie
jgatieAnswer
March 12, 2023

Turn off CEC (Simplink) before you switch to the internal speakers.

RobbioAuthor
Enthusiast I
March 13, 2023

Turn off CEC (Simplink) before you switch to the internal speakers.

Thats disappointing. Turning CEC (Simplink) off means I lose that functionality between my other devices hooked up to the TV

Airgetlam
Airgetlam
March 13, 2023

And yet turns on the internal speakers, per the CEC specifications. Feel free to blame the consortium of companies that came up with the ‘rules’ for CEC, which only allow one audio sink at a time. 

Bruce
buzz
buzz
Grand Maestro
March 13, 2023

Is BEAM’s Night Sound useful? 

Another approach is inserting a CEC blocker in the HDMI cable to BEAM. Note that this will also block Volume commands on CEC. You’ll need to enable IR Volume control of BEAM. And, there may be some LG quirks since it cannot use CEC.

RobbioAuthor
Enthusiast I
March 13, 2023

It must be Sonos implementation, my old Bose soundbar didn't force back ARC when changing to Internal Speaker.

 

  • Sonos has a player led HDMI Arc handshake. (The sound bar initiates a CEC connection with the TV) 
  • Bose has a TV led HDMI Arc handshake. (The TV initiates a CEC connection with the Soundbar) 

 

I was just asking if there was a way to switch implementations which I see there is not.

 

 

buzz
buzz
Grand Maestro
March 13, 2023

Were you using this same LG TV with the BOSE system?

RobbioAuthor
Enthusiast I
March 14, 2023

Yes it is the same TV.

buzz
buzz
Grand Maestro
March 14, 2023

A sometimes helpful procedure is to remove all HDMI connections from the TV, then reboot the TV and BEAM. Now, connect BEAM to the TV and let them renegotiate. After the TV and BEAM are finished negotiating (give then a couple minutes), then connect any other devices to the TV.

If this clears the issue a future update might result in this or another issue, and it will always be the “we’ve never seen this issue before” (it must be the other guy’s fault) response.

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