The use of Sound in a Film is key in determining the feel of a film. The presence or absence of sound can make the viewer feel emotions or tie them to the movie. Blow Up's use of sound is a prime example of this. The movie takes on a very natural feel because Herbie Hancock, who scored the film is quoted as saying "It's (the sound) only there when someone turns on the radio or puts on a record." This leads to a film that feels like almost real life. Because there isn't any unnecessary noise to distract the viewer, only the naturally occurring sounds. This immerses the viewer into the film.
The Sound design used in Blow Up also conveys feelings onto the audience. The sense of peacefulness inside the park when Thomas is photographing the lovers. The absence of sound beyond ambient is very important as well. Blow Up is known for its use of silence as an element, similar to Stanley Kubrick's 2001: a Space Odyssey. The sense of mystery and almost dread that comes from the lack of sound during the scene where Thomas is investigating the figures in the photographs (figure 1). Another key example is during the scene where Thomas has discovered the body in the park and the scene is drawn out and suspenseful by the lack of sound the snap of a twig makes Thomas run as well as the audience almost jump at something so trivial.
Figure 1
Another Key use of sound is in the conclusion of the movie, The Mimes playing tennis with what is supposed to be an invisible ball slowly becomes more real to Thomas(Figure 2). The key use of sound to make the audience almost think it is real is enough to further blur the lines of what is perceived as reality and what is Thomas’ imagination. Is the ball real? was the body real, or a trick of the mind from searching too hard for something that doesn't exists. these are all questions sparked by just the sound in the
Figure 2
Overall, although Blow Up is surrounded by controversy due to its graphic content, the real shining star is the sound design that envelops and captivates the audience and has them asking key questions about the film