We own hi fi equipment worth thousands of dollars and we do not want to listen to UHD music on a stand alone speaker. Amazon needs to get the fire sticks, cubes etc. that we already have plugged in our systems to play UHD. Simple as that. I will not sign up for the service until you fix this issue. If Amazon does not do this, Nvidia or Apple will inevitably eat your breakfast.
Amazing level of ignorance isn't it.
I can play the "UHD" stuff through the Heos app and my Marantz receiver, but its clunky at best.
I would ideally like to use an Amazon music app on my Sony TV, but Amazon seem to have pointblank refused to release an amazon music app for Android TV, despite releasing a Prime Video app.
I would also be willing to buy a firestick if it supported UHD playback, but no joy there either.