Amazon is offering a 90 day trial to their new Amazon Music HD for new and existing users of Amazon Music or Prime.
This is offering high definition audio both on mobile devices and some home entertainment systems.
The quality is outstanding and the music choice excellent.
Steaming in my Sonos is superior to Spotify and even Apple Music.
On my mobile devices the quality is good too but it comes with the price of more storage required for the files which can be big for ultra hd quality.
Nothing to loose to give it a try.