You expect a high-end AVR to support Atmos via its music streaming service but so far, no AVR offer such support, not even NAD's T778, which have the excellent BluOS system (limited to two channel stereo only). I thing among all music services, HEOS is the worst ever! You cannot upload more than 300 songs to the playlist, Deezer HIFI is not supported. So far Yamaha's Musicast is the best solution. I heard that the upcoming RX-A8A and A6A will have Atmos support via Musicast as well, so good chance it will support Tidal's atmos.