This is not hi-res quality music. Most songs seem to be redbook cd quality. Hi-res quality can be 24/192, but DSD and MQA are of much better SQ. Since I have hundreds of DSD or 24/192 songs ripped, and also stream Tidal MQA, I use roon. I will never use USB to connect to an external dac so I use Roon server on a Mac and my PS Audio DS sr dac is accessed using wired Ethernet. Right now, nobody else has perfected using Ethernet going to a dac. As soon as Roon has an update to gain access to Amazon so I can compare an Amazon HD song to a Tidal MQA song, I’m happy with Tidal

Like @rbstehno I was disappointed to find out that I could not stream Amazon music files to a UPNP renderer.  I worked hard to get off of USB and that's a deal breaker for me.   
Like @rbstehno I was disappointed to find out that I could not stream Amazon music files to a UPNP renderer. I worked hard to get off of USB and that’s a deal breaker for me.

Yes that’s lame - but marginally excusable: AMHD is relatively new and doesn’t have much tenure yet out in the 3rd-party device/software environment, let alone the open-source audio ecosystem. But given Amazon-as-vampire-squid it’s hard to imagine any other approach other than one that benefits their businesses/services first. Short answer: don’t expect parity anytime soon with Tidal and Qobuz in support of the broader open-source audio community.

AMHD ’lying’ about HD is also lame. So are its feature and UX shortfalls. Simple example: no user-facing feature to create ’stations’ from artists. That problem was solved years ago by the competition - and has been missing from Amazon Music since at least 2014.