Rehearsals for the "Sin After Sin" sessions took place at Pinewood Studios in London, with recording commencing in January 1977 at The Who's Rampart 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.