Bass – Bob Cranshaw (tracks: A1 to A4, B3, B4), Ron Carter (tracks: A5 to B2)
Design [Cover] – Michael Malatak
Drums – Grady Tate
Engineer – Phil Ramone (tracks: A1 to A4, B3, B4), Rudy Van Gelder (tracks: A5 to B2)
Engineer [Director Of Engineering For MGM] – Val Valentin
Engineer [Remix] – Rudy Van Gelder
Guitar – Kenny Burrell
Leader, Trumpet – Donald Byrd
Liner Notes – Jack Maher
Percussion – Candido (tracks: A5 to B2)
Piano – Herbie Hancock
Producer – Creed Taylor
Tenor Saxophone – Jimmy Heath (tracks: A1 to A4, B3, B4), Stanley Turrentine (tracks: A5 to B2)
Vocals – The Donald Byrd Singers (tracks: A1 to A5, B2 to B5)
Notes
The Donald Byrd Singers are two groups: three females (A1 to A4, B3, B4) and two male and two female voices (A5, B2)
A1 to A4, B3, B4 Recorded at A. & R. Studios, New York City November 3, 4 & 6, 1964. A5 to B2 Recorded at Van Gelder Studios, Englewood Cliffs, N.J. December 16, 1964.