I have a new Sony 4K TV attached to my Sonos Soundbar (+sub and two Play1s) that came with the usual remote and a Touchpad remote. Both remotes have a volume up and down rocker switch and both control the TV volume well (as evidences by the volume bar that appears at the bottom of the screen whenever I change the volume (wish I could get rid of that)). Soundbar is connected to TV via optical cable and all sound goes through Sonos. I've had no trouble syncing up the remotes for Sonos volume control from my Apple TV remote and standard Sony remote control but the Touchpad remote won't sync. When I try to sync it, I get a message from Sonos that this will erase all the other remotes. I eventually decided to go ahead and say OK, erase all the other remotes. I then tried syncing the Touchpad remote and when it says to press the up volume key, I do and nothing happens. The remote programming part of the Sonos app just sits there telling me to press the up volume key. If I exit that section of the remote app, all my other remotes still control the volume of the Sonos system. Clearly a problem with how the Touchpad remote sends volume up and down signals to the TV, but the Touchpad seems to be working with the TV itself, if I turn on the TV speakers. Weird. Not an important issue but just curious if anyone has noted this and if there is something I'm doing wrong.
Best answer by MikeV
It's possible that the touchpad remote is using radio frequency (RF) or Bluetooth communication with the TV rather than infrared (IR).
The Sonos Playbar will only recognize IR remote controls for volume adjustments. RF or Bluetooth remotes won't work with Sonos.