Enthusiasm: The Symphony of Donbas, also referred to as Donbas Symphony or The Symphony of the Donbas Basin, is a 1931 sound film directed by Soviet filmmaker Dziga Vertov. The film was the director's first sound film and also the first of the Soviet production company Ukrainfilm. The film's score is considered experimental and avant-garde because of its incorporation of factory, industrial, and other machine sounds; human speech plays only a small role in the film's sounds.