Apple Music Atmos Lossless Airplay on Arc

Thanks for your post, did you have noticed any audible difference between airplay and through Sonos app?

In Sonos app stream seems to be lossy again, aac 256 k, while via airplay the stream must be lossless unsampling to 16 bit/44.

DOLBY Atmos is working for me from iOS Apple Music App to Sonos Arc, its display Dolby Atmos on my Apple TV App.

https://youtu.be/iqSUw6vWgi8

It’s not ATMOS unless you can see it in the SONOS App…..

Mines definitely not showing it even on the about my system function am I doing something wrong 

OP stated that atmos audio via airplay works when you play through an Apple TV.  Essentially, Sonos is playing TV audio, not receiving a direct airplay signal.