So, there were not any explicit answers that I could find. I found it when I prayed about it.
So:
On the Firestick: Home>Settings>Equipment Control>You my have to enter your PIN>Manage Equipment>Add Equipment>Scroll Down to Soundbar>Select Sonos.
It walks you through the rest. It took about five minutes.
Hi @dmars
Sonos soundbars that connect through HDMI rather than by optical will not need any such steps - I was just seeking to clarify your post for anyone new to Sonos who might read it.
HDMI carries a communication channel known as CEC so that devices can send each other signals about volume and power so they don’t need to learn each other’s remotes. When connecting via optical, this is not available, and any remotes that do not, by default, utilise infrared light must be told to do so, and the Sonos device must be taught the codes the remote uses.
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