soundtrack

The audio portion of a film or video recording.

The music that accompanies a movie.

A commercial recording of such music.

A narrow strip running down a movie film that carries the recorded sound in synchronization with the pictures.

The sound (especially the music) component of a movie.

A recording of such music for sale.

To provide, or to act as the sound or music component of a film

sound recording on a narrow strip of a motion picture film