A:Answer No Samsung TV supports Dolby Vision but they do support HDR10 and HDR10+. As far as DTS-X goes, I run everything through my Denon AVR so my 75RU8000 is strictly a monitor but it appears if you use the ARC feature (sending the audio back to a receiver), it should automatically detect a DTS-X signal (check your settings to be sure) but if you use the TV speakers only, you will hear it but the TV speakers obviously can't reproduce the quality sound that a full surround sound setup could.
