About to buy and seen this crop up on other intel NUC's.
Searched for hours but can't confirm one way or another.
I only need them to output the lossless audio like my android/kodi box etc, I'm aware it does not decode.
In regard to your questions, on the following link you will find the TPS (Technical Product Specifications) for the NUC, in there on page 20 you will see that it does support DTS-HD and other audio formats:
Any further questions, please let me know.