David C. Johnson (born January 30, 1940 in Batavia, New York) is an American composer, flautist, and performer of live-electronic music.Johnson studied, among other places, at Harvard University (M.A. in composition 1964), with Nadia Boulanger in Paris, and at the Cologne Courses for New Music in 1964–1965, 1965–1966, and 1966–1967.In 1966–67 he was an independent collaborator at the Electronic Studio of the WDR, where he assisted Karlheinz Stockhausen with the production of his electronic work Hymnen. He also operated the live-electronics in the first performances of the chamber-orchestra version of Stockhausen's Mixtur (1967), and in the Darmstadt collaborative works directed by Stockhausen, Ensemble in 1967 and Musik für ein Haus in 1968.