I bought a Fire TV Cube and tried to playback 360RA from Amazon Music app. First of all, as you may already know, I have a Marantz SR7015 that should be capable of playing MPEG-H audio which is the format behind 360RA.
With the help of
@Evanesco I was able to test the MPEG-H playback capabilites with an Nvidia Shield 4K and an app called iRZ Mpeg-h Player.
When I read that Amazon Music was streaimg pure MPEG-H audio through a Fire TV Cube I bought that too. Once installed I had to do a couple of updates, both on the Cube and the Amazon App.
Once it was done I played a song I had on my favorites, Hall & Oates Rich Girl.
And it worked!!
Then I played back one of my favorite Quad songs available in 360RA.
That worked too!!
There’s only one “issue” that I could live with. When a quad recording is played back from 360RA it’s spread through the all channels available, in my case 7.1.4, because of the nature of MPEG-H encoding which is object based and not channel based