Samsung Soundbar Apple Tv Remote. Put tv in audio only mode. Once universal remote is setup and everything is switched on, do the steps below:
I already tried programming the soundbar remote to my apple tv and it worked, but i still can’t change the volume from my controller. With the 4th gen apple tv and the forthcoming apple tv 4k, your siri remote for apple tv can be the one remote to rule them all. Fling whatever you want at the apple tv and never deal with bluetooth dropping because it's all wired up.
This magically worked for me:
Point your cab or sat remote at the tv/soundbar. With a bose solo soundbar attached via optical to the tv. Your apple tv 4k or apple tv hd should automatically detect the tv or receiver that you plug it into and program your siri remote or apple tv remote 1 to control power and hdmi input. I went into settings to train the siri remote to control my soundbar via ir rather than my tv.