Historically HDTracks is no ’true-resolution’ saint either, tho’ fishyness at their scale is/was small ... fry? compared to what A-zon is capable of. And they seem to have cleaned up their act several years ago, after some ’high-profile’ exposure of their antics.
I am a Prime member but this would be my first time with any service. I have a nice DAC but need the software/ hardware(??) between like Bluesound as I've read.....not sure how to link the service to my DAC. Don't want to use a computer or phone/ tablet. What are the units Amazon HD can work with?
Hope I explained that right.
I got this on another forum

"Those settings are for the "offline listening" downloads that are tied to your Amazon Music / Music HD player and streaming subscription. Cancel your streaming subscription and they're gone.

Purchased downloads that you can keep permanently come from the regular Amazon store, in MP3 only. From Amazon's perspective it's natural to cross-sell, but I think a lot of customers are going to be confused and unhappy


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so even though in Amazon HD you have the option to select HD downloads after you purchase a song, you only get an MP3 file when you do it