During the previous album's tour, the band had added vocalist-percussionist Royce Jones, vocalist-keyboardist Michael McDonald, and session drummer Jeff Porcaro. Porcaro played the sole drum track on one song, "Night By Night" on "Pretzel Logic" (Jim Gordon played drums on all the remaining tracks, and he and Porcaro both played on "Parker's Band"), reflecting Steely Dan's increasing reliance on session musicians (including Dean Parks and Rick Derringer). Jeff Porcaro and "Katy Lied" pianist David Paich would go on to form Toto. Striving for perfection, Becker and Fagen sometimes asked musicians to record as many as forty takes of each track.