Sound design
Sound design, as a distinct discipline, is one of the youngest fields in stagecraft, second only to the use of projection and other multimedia displays, although the ideas and techniques of sound design have been around almost since theatre started. Dan Dugan, working with three stereo tape decks routed to ten loudspeaker zones during the 1968–69 season of American Conservatory Theater (ACT) in San Francisco, was the first person to be called a sound designer.