BLUESOUND NODE X

Hello, 

Since recently I am using NODE X in order to stream music from my AMAZON MUSIC account. I access my AMAZON account from the BluOS app. I noticed, that some tracks (which normally are with Dolby Atmos, or HD quality in my Android app) are played with CD quality, using the BluOS app. Does anyone can advise why is that? Is it possible in general to play Amazon Music HD formats through BluOS app, and if yes, what I am doing wrong?

Thanks in advance!