soundtrack

The movie's soundtrack became more famous than the film itself, selling millions of copies.

(Chinese) 这部电影的原声带比电影本身还要出名，销量达数百万张。

He listened to the Star Wars soundtrack while doing his homework to help him focus.

(Chinese) 他边做功课边听《星球大战》原声带以帮助自己集中注意力。