The Ultimate Collection

Compilation by Chicago

Released 1984

Al Jardine
background vocals [17]
Armin Steiner
assistant [11], strings [5, 7-8, 11, 11-12, 17]
Brian Ross-Myring
engineer [1, 6]
Carl Wilson
additional [11], background vocals [11, 17]
Chicago
producer [3]
Chris Hinshaw
engineer [1, 6]
David “Hawk” Wolinski
synthesizer [8, 17]
Dennis Wilson
background vocals [17]
Dominic Frontiere
orchestrator [11]
Don Puluse
engineer [1, 6]
James William Guercio
acoustic guitar [5, 11], bass [5, 11], guitar [17], orchestrator [11], producer [1-2, 4-9, 11-17]
Jeff Guercio
assistant [13, 16], engineer [4, 8, 12, 17]
Jim Boyer
engineer [3]
Jimmie Haskell
French horn [5], strings [5, 8]
Leroy Williams
steelpan [7]
Mark Guercio
engineer [4]
Othello Molineaux
steelpan [7]
Patrick Williams
orchestrator [4]
Peter Cetera
lead vocals [4-8, 12-13, 16], orchestrator [11]
Phil Ramone
mix [4, 8, 12-13, 16-17], producer [3]
Richard Blakin
assistant [13, 16]
Terry Kath
lead vocals [1, 9, 17]
Tim Cetera
additional [11], background vocals [11]
Tom Likes
assistant [5, 7, 11]
Walter Parazaider
flute [1], solo [1]
Wayne Tarnowski
engineer [4-5, 7-8, 11-12, 15, 17], recording [13, 16]