X9S will pass the Dolby Atmos codec to your receiver if the audio output is set to RAW, it is working very well.
You need to set up Atmos speakers environment in your receiver, even you don't actually have the Atmos speakers, otherwise your receiver will only show TrueHD instead of Atmos.
Thanks. I have only tv connect to sony hw700ds amp headphone receiver and its connect to my zidoo. My sony didnt support Atmos. That the reason That i cant see.