bitflipper
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They could have saved a lot of time and money - and kept true to the original - by just hiring Vangelis to start with.
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And Vangelis would have turned it down. He's not very good at "repeating himself" even to the point of not wanting to do concerts, although this is mostly because he does not fly to locations. So he has said.
Ridley Scott knows how to use music, and did it again in "Legend". Hans Zimmer was brought in because he had already worked with Ridley Scott ... however, I think that he came in much too late, as suggested, to be able to do anything with the soundtrack, and the movie was already shot, and more than likely, none of the directing and filming would be able to use the music and choreograph some visual sequences off it, like some moments were done in the original.
The biggest problem is that the director of the film does not know how to use MUSIC, and just phones it in (as you say), to accentuate the transitions in the story and dialogue ... the majority of the music and its use in this film would get a D from me, for lack of originality and "standard" use, instead of any originality all around.
Btw, just because it is loud and has some reverb or effect on the sound, does not make it great! Even those effects were in-necessary most of the time, and all they did was try to make the film more "out there" than it would normally be. As it is, it was just a waste of money and budget to create something that had no soul in the first place, and were just another terminator movie, or another diesel film.
End of story ... if my name was Phillip K. Dick, I would have put out a comment that I disown any connection to the original and want to have nothing to do with the bad copy and lousy writing in the film.