There are two general categories of movie music: the kind that is composed specifically for a film and the already released kind that was selected by someone for the film. As for which works better, it is up to the director or whoever else makes those big decisions (and if you know anyone who needs someone fills that roll, contact me). Then there’s the music that, while not in any film, sounds like it was written for a film—sometimes, better yet, a particular scene in a film. I always thought …