David Van Cortlandt Crosby (born August 14, 1941) is an American guitarist, singer, and songwriter. In addition to his solo career, he was a founding member of three bands: The Byrds; Crosby, Stills & Nash (CSN, who are sometimes joined by Neil Young as Crosby, Stills, Nash and Young [CSNY]); and CPR. Crosby has been depicted as emblematic of the counterculture. Crosby has been inducted into the Rock and Roll Hall of Fame twice: once for his work in The Byrds and once for his work with CSN. Crosby joined Jim McGuinn (who later changed his name to Roger) and Gene Clark, who were then named the Jet Set. They were augmented by drummer Michael Clarke, at which point Crosby attempted, unsuccessfully, to play bass. Late in 1964, Chris Hillman joined as bassist, and Crosby relieved Gene Clark of rhythm guitar duties. Through connections that Jim Dickson (The Byrds' manager) had with Bob Dylan's publisher, the band obtained a demo acetate disc of Dylan's "Mr. Tambourine M...