Still trying this and I have found that turning off match frame rate (in Plex settings is sufficient, leaving it set in the Cube config for other apps) results in shows playing, TrueHD (including Atmos) and DTS works again and passes through , DTS-HD ends up as the core, DTS-5.1. Not sure if DTS-HD is meant to work, I don’t know what the specs mean by DTS-HD (basic profile) …
