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I stand corrected. Both DTS X and Dolby Atmos were ripped successfully. It was Kodi 16.1 that does not support. Tested in Kodi 17 and both audio formats worked perfectly.

I have ripped DTS X bluray discs and they do not show up as DTS X but as "DTS Neural X".

I just want to confirm that DTS X is not supported when backing up bluray disc as of this date.