Soundtrack (noun)

1. The recorded sound accompanying a film or television program.
2. The background music of a video game.
3. A recorded collection of songs featured in a film, television program, or video game.

Origin:

Early 20th century: from sound + track.

Examples:

1. The movie's soundtrack was composed by a famous musician.
2. The soundtrack of the video game was praised by critics.
3. He listened to the soundtrack of his favorite movie while working.
4. The soundtrack of the play was composed of classic songs.
5. The soundtrack of the documentary was filled with haunting music.