Server Version#: 1.31.1.6782
Player Version#: Plex Android TV on SONY KD-49XG8377
Hello,
Sorry for the translation, I’m French, when I configure the audio passthrough in HDMI, I have all the sound formats except DTS. On the other hand in Optics the DTS works correctly but I do not have Dolby Atmos (normal it only works in HDMI ARC). I’m using an HDMI Arc soundbar.
The TV’s native player (Sony) correctly switches the different audio sources. I conclude that it is related to Plex.
Thanks in advance.
Hello and thank you for your interest in my problem.
The client and server versions of plex are up to date 
What I don’t understand is that the sound works very well with the TV’s native application. I have a plex player installed on the decoder of my box and it works very well, I configure the passthrough on hdmi and I have DTS, DD, Dolby Atmos etc. But the plex version of the TV (which is the same as the one on the decoder) does not render DTS on the Sonos Beam in HDMI passthrough (when I choose “optical” passthrough I have DTS but no longer Dolby Atmos, normal, but the sound is shifted suddenly). I have to admit that I don’t understand.