Film scores are, by and large, manipulative. They do their work at the periphery of the senses, signaling danger, heralding victory, prodding us toward fear and joy in time with the unfolding story. Crucially, they are also empathic, letting us in on what the actors' words or faces may not convey. And when things get unpleasant, the score can step in as an emotional buffer — a layer of unreality between us and the action that lets us know we're safe. Sunday night at the Oscars, Hollywood will honor a film whose music manages to get all these things right.