I have an Echo in the kitchen and have managed to pair it with a Bose Solo soundbar in the sitting room but cannot get it to play music through both at the same time.
The only help I can find says to create a Multi-room music group on the Alexa app, but this doesn't seem possible without a second Echo device in the sitting room.
I can play the music through either the Echo in the kitchen or the Bluetooth connected soundbar in the sitting room but not both.
Any advice?