playing Beatles' covers, Beatlesque renditions of traditional folk songs, and some self-penned material. The duo soon added Crosby to the line-up and named themselves the Jet Set. Over the coming months, Hillman and drummer Michael Clarke were added to the Jet Set and the band signed to Columbia Records on November 10, 1964. They changed their name to the Byrds over Thanksgiving that year. On January 20, 1965, the band entered Columbia Recording Studios in Hollywood to record the then-unreleased Bob Dylan song "Mr. Tambourine Man" as their debut single. Record producer Terry Melcher felt that the band hadn't completely gelled yet musically, so he brought in a group of L.A. session musicians, later known as the Wrecking Crew, to provide the musical backing on the single. As a result, McGuinn was the only Byrd to play on "Mr. Tambourine Man" and its Clark-penned B-side, "I Knew I'd Want You". The single was released in April 1965 and was an immediate hit, reaching number 1 on both the U.S. Billboard Hot 100 chart and the UK Singles Chart. In addition, the electric rock band treatment that the Byrds and Melcher had given "Mr. Tambourine Man" effectively created the template for the musical subgenre of folk rock. Although the band's musicianship improved following the recording of their debut single, it was assumed by both Columbia and the band's management that their entire debut album would be recorded with session musicians. The band, however, had other ideas and insisted that they be allowed to perform the album's instrumental accompaniment themselves. By the start of recording sessions for the album, Melcher felt satisfied that the group had polished their sound enough to be able to produce professional-sounding backing tracks and the Byrds were allowed to record the rest of the Mr. Tambourine Man album without any help from session musicians. However, a persistent and widely circulated rumor about the album is that all of the playing on it was done by session musicians (a misconception that is likely due to confusion between the "Mr. Tambourine Man" single and the album of the same name). Hillman has stated in interview that the contrast between the more polished sound of the two tracks featuring session musicians ("Mr. Tambourine Man" and "I Knew I'd Want You") and the sound of the rest of the album is quite noticeable. Recording was completed on April 22, 1965. Music