ABSTRACT
The final form of a movie's total aural impression is called the film's sound design. A film's sound design consists of layering multiple tracks of sound, anywhere from two tracks to over a dozen. The sound components of a film, the aural elements of the sound design, can pretty much be organized into four broad categories: speech, sound effects, ambience, and music. These sounds constitute the way a film aurally communicates to an audience, but not every scene within a film will have all three types of sound. The consideration for sound is whether the audio as it is realized in the sound design is in sync with the picture or not, in which case it is called nonsync audio. Off-screen dialogue is dialogue that comes from a person who is assumed to be in the time and space of the film but simply is not in the view of the camera.
