Forget the music it's the overall sound design, music is just a small part of it. Villeneuve's vision for the whole thing was to make it sound like a documentary: The desert sounds like desert, not like music, the ornithopers sound like -- erm, they sound like ornithopters, not helicopters or music, everything sounds natural. As if shot on location, on actual Dune, and that atmosphere is given plenty of screen time, no grand musical scores interrupting the immersion.

EDIT oh wait you were talking Star Wars, not Dune. Yep, completely different beast. Also the THX logo not just the 21st Century Fox fanfare is part of the score I'm ready to die on that hill.