Soundtrack

The term soundtrack refers to three related concepts: recorded music accompanying and synchronized to the images of a motion picture, television program or video game; a commercially released soundtrack album of music as featured in the soundtrack of a film or TV show; and the physical area of a film that contains the synchronized recorded sound. In movie industry terminology, a "sound track" (two words) is an audio recording created or used in film production or post-production. Initially the dialogue, sound effects, and music in a film each has its own separate track (dialogue track, sound effects track, and music track), and these are mixed together to make what is called the composite track, which is heard in the film. A dubbing track is often later created when films are dubbed into another language. The contraction soundtrack (one word) came into use with the advent of so-called "soundtrack albums" in the early 1950s. First conceived by movie companies as a promotional... full article at wikipedia