Crosby arrived back in Chicago from NYC to hang out with Terry Callier. On tour and in Chicago at that time was Miriam Makeba and her band, which included a multi intrumentalist Jim McGuinn. Terry introduced McGuinn to Crosby. 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 Man" and recorded a version of the song, featuring McGuinn's 12-string guitar as well as McGuinn, Crosby, and Clark's vocal harmonizing. The song turned into a massive hit, reaching number one in the charts in the United States and the United Kingdom during 1965. While McGuinn originated the Byrds' trademark 12-string guitar sound, Crosby was responsible for the soaring harmonies and often unusual phrasing of their songs, but whilst he didn't sing lead vocals on either of the first two albums, he sang lead on the bridge in their second single "All I Really Want to Do."