But all of that was about to change, when he released his fifth studio album, Walls and Bridges, on October 4, 1974, in the UK. In June he began work on his fifth studio album, Walls and Bridges, with a more professional plan. Instead of the party atmosphere that surrounded the Spector sessions, the recording sessions for Walls and Bridges were very structured and organized, devoid of booze and drugs. ADVERTISEMENTJimmy Iovine, overdub engineer on the album, said: “The Walls And Bridges sessions were the most professional I have been on. It was, of course, a factor in propelling Walls and Bridges to the top spot.