Plex does not identify Atmos or dts:X audio in any client.
Plex Web, app.plex.tv, displays if the video is Dolby Vision, HDR10, etc. This has not yet made it to all clients.
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4K DoVi (HEVC Main 10)= Dolby Vision only (ex: DV profile 5 used by streaming services) -
4K DoVi/HDR10 (HEVC Main 10)= both DV and HDR10 (ex: DV profile 7 from Blu-ray disc) -
4K HDR10 (HEVC Main 10)= HDR10 or HDR10+ only -
4K HLG (HEVC Main 10)= HLG
HDR10+ is not uniquely identified. It is listed the same as HDR10.
Some existing feature requests:
[Feature Request] Media Info on Dolby Vision Videos
Oragnize movies by Dolby Vision Yes or no // mod: filter for Dolby Vision content
Correctly identify & display Dolby Atmos, dts:X, and dts-HD MA audio tracks in Plex clients