D. A. Pennebaker made his filmmaking debut with the 1953 short Daybreak Express, set to a Duke Ellington song. In 1959, he joined Drew Associates, a group of filmmakers organized by Robert Drew which developed the first portable 16mm synchronized camera and sound system. This technological development helped Pennebaker and his colleagues establish what became known as « Cinema Vérité». Out of this new style of filmmaking came such classics as Don't Look Back (1965) and Monterey Pop (1968). His most recent film, with Chris Hegedus and Nick Doob, is Down From the Moutain based on the music of Joel and Ethan Coen's O Brother Where Art Thou ?