Generally, sound may be described as an 'organiser of movement, as well as an intensifier'. After this identification, one may conclude the way in which sound exposes atmosphere is important to the film as an aggregate. The narrative function of sound cannot go understated - its story telling capabilities are often overlooked by mainstream audiences. Synchronism refers to a sound where the source is visually identifiable. Asynchronism is a sound where there is no apparent source.
Parallelism refers to a sound that compliments an image.
The Counterpoint indicates a sound that creates meaning itself. Actualised sound has a narrative source and Commentitive sound has no story basis, however follows a directorial orientation. This thorough framework is useful in analysing the importance of sound to film. One must also establish a dichotomy between the musical score and soundtrack. Zaza subscribes to the theory that sound has the ability to evoke images, however music acts more directly to bond the audience and the story.