Recorded at the RCA Victor Studios, New York City on June & July, 1964
Sonny Rollins – tenor saxophone
Herbie Hancock - piano (4, 6, 9) Jim Hall - guitar (3, 6, 8, 10) Bob Cranshaw - bass Mickey Roker – drums David Izenzon - arco (bowed) (6) Teddy Smith - bass (6) Stu Martin - drums (6)