I have a samsung Q70 soundbar and overall it's good. The only problem I have is with Spotify. When I go to the Spotify app and and press it to play on the sound bar it connect to it but I get no sound. If I go in to the SmartThings app I can see the bar is on WiFi mode and playing it but still no sound. When I ask Alexa to play Spotify on its self it's fine but to play on the sound bar I get told I need a connected device.
The reason why it fails to listen to Spotify music on the soundbar is that Spotify doesn’t offer its service to the soundbar. Thus, you’ll find there is no sound. To make Spotify work with the soundbar, you need to download and convert Spotify music to a playable audio format first. You could try to use a Spotify music converter to get Spotify songs first then you can play Spotify on Samsung soundbar.