As the film plays out as a photomontage, the only continuous variable is the sound. The sound used in this production is minimal, showing up in the form of narration, Orchestral score and sound effect. The rhythmic patterns of the soundtrack act as a framework to add to the intensity of the film. "The dissolve is synchronized with the sound. As the story moves from the past to the present, "La Jetee" creates mental continuity." The soundtrack adds to the illusion of movement within the film and the change of time.