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I recently attached my Playbase home theatre setup to a TCL Roku TV. Playbase uses an optical connection.  Currently the only way I can control the volume is via the Sonos IOS app. 
 

On the tv I’ve set audio output to optical - if I set it to auto, the tv speakers are also enabled and they do respond to volume changes. Unfortunately, it creates a delay so the sound echos. The Playbase does not respond to the remote volume control at any point. 
 

I previously had the system attached to an LG OLED and the volume operated fine using either the TV remote or the Apple TV remote.  
 

Both the TCL Roku remote and the Apple TV remotes appear to be RF. 
 

im at a loss…

Presumably you used the Set up Remote (or whatever it’s called/labelled) when you first installed the Playbase? Have you reset things in order to recognise the new remote? 


If the TV remote is RF only then it can’t be used for this.

The Apple TV remote can be switched to IR mode, then you can teach the Playbase its codes.


Presumably you used the Set up Remote (or whatever it’s called/labelled) when you first installed the Playbase? Have you reset things in order to recognise the new remote? 

Yes. Deleted and reinstalled the remote.  I will try changing the Apple Remote to RF. 


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