Michael Chion describes the relation between sound and image as “added value”. Sound manipulates the way the image on screen is perceived, it can enhance image expression and suggest scenarios that are not visible on screen. Sound works as the “audiovisual chain”, unifying and binding the flow of images and defining the atmosphere.
(*ref: Audio-Vision: Sound on Screen, Michel Chion, 1994)
Pic: Revolving Spheres, Visiophone/ The Bot/ Jaques-Andre Dupont/ Gold Thinking, Alba Corral