Sin After Sin is the third studio album by English heavy metal band Judas Priest, released on 8 April 1977 by Columbia Records. Produced by Deep Purple bassist Roger Glover, it was the band's major label debut, their first album for the label, and their only album to feature drummer Simon Phillips, a studio musician who replaced original drummer Alan Moore for the recording sessions. Background After releasing their first two albums on the small Gull label, Judas Priest grew dissatisfied with what they saw as a lack of financial support from their record company. Their previous album, Sad Wings of Destiny, caught the attention of , and with the help of new manager David Hemmings, the band signed with CBS and received a £60,000 budget for the follow-up album, which was to draw its title phrase "sin after sin" from the lyrics to the song "Genocide" from the Sad Wings album. The move to CBS required breaking their contract with Gull, and once the legal dust had settled the band had forfeited the rights to those first two albums and all related recordings to Gull. Production Rehearsals for the Sin After Sin sessions took place at Pinewood Studios in London, with recording commencing in January 1977 at the Who's Ramport Studios in the Battersea district of London. Deep Purple bassist Roger Glover was hired to produce the album with Mark Dodson serving as engineer. The band's studio experiences while with Gull were less than satisfying, particularly during the mixing of Rocka Rolla, and they were initially quite keen to produce Sin After Sin themselves. CBS, however, insisted on an experienced producer. Deep Purple bassist Roger Glover was suggested and the band agreed, but after one session the band fired Glover, informing him that they would continue on their own. After a few weeks of struggling with unsatisfactory recordings, the band recalled Glover and the sessions began anew, with only six allotted days remaining. It was also during this period that the band parted ways with drummer Alan Moore, feeling that his technique was too limited for their evolving sound. Session drummer Simon Phillips was brought in to finish the sessions. The album includes a cover of the Joan Baez song "Diamonds & Rust", a decision which was encouraged by producer Roger Glover in the interest of adding a track with commercial potential. Indeed, "Diamonds & Rust" was the first