No. There is no DTS HD MA or DTS X support on this soundbar. Samsung feel £1300 is not enough to pay for this privilege. Bit of a joke really, even though there is an advert for this soundbar on AVSForums clearly stating in a number of places that is supports DTS X. Unless they get their act together soon and give us this then it is unlikely to ever happen as there has only ever been 1 update to the soundbar in 2 years.
I've just found this thread too. I've bought a few 4K Blu-rays recently, and found out that the sound bar doesn't even support DTS-X.
Extremely disappointed right now. Especially since I've recently bought this sound bar.
Come on Samsung, please add support for it! I have two other friends with the same exact problem, and we're all discussing if we should return these units.