Credits

Herbie Hancock: Piano
Ron Carter: Bass
Buster Williams: Bass
Herbie Mann: Producer
Jack Wilson: Piano
Joe Henderson: Tenor Saxophone
Leonard Feather: Liner Notes
Sonny Sharrock: Guitar
Roy Ayers: Vibraphone
Donald Bailey: Drums
Freddie Waits: Drums
Bruno Carr: Drums
William S. Fischer: Arranger