When one begins to analyse film sound, two terms must be understood; digetic sound and non-digetic sound. These terms relate to the source of the sound. For example, digetic sound refers to the sound that exists within the world of the film (if a character knocks over a glass of water, the sound the glass makes as it smashes on the floor exists in the world of the film and is therefore, digetic). Alternatively, sounds such as the musical score, which are played over the top of the action to highlight a particular sequence are non-digetic (the descending musical motif that accompanies the glass falling through the air does not exist in the world of the film and is therefore, non-digetic.) (Choin, 1994)Furthermore, all sound present on the sound track, whether it
References: Bruce, G. (1985) Bernard Herrmann- Film Music and Narrative. UMI Research Press, Michigan. Choin, M. (1994) Audio-Vision- Sound on Screen. Columbia University Press, New York. Cook, P. (1997) The Cinema Book. British Film Institute, London. Richard Dyer, ‘Sound ' in BFI Modern Classics: Seven (London: BFI, 1999, pp. 50-57) Giannetti, L. (2002) Understanding Movies. Prentice Hall, New Jersey. Phillips, W. (2002) Film- An Introduction. Belford/St. Martins. USA Vandelist, (2000) More than just a ‘Thriller", USA. (http://www.amazon.com/gp/product/B000050FEN/002-9493453-1977665?v=glance&n=130&v=glance) Film Resources David Fincher, Se7en. Alfred Hitchcock, Psycho.