Tonin' marked The Manhattan Transfer's return to Atlantic Records. The term "tonin'" is associated with the vocal groups of the 1950's and 1960's and the songs here are favorites of the group from that era in time. The list of guest artists is impressive and lends an air of festivity to this wonderful collection of classic R&B songs.

Abraham Laboriel Sr
Carlos Vega
David Spinozza
David Williams
Dean Parks
Greg Phillinganes
Harvey Mason Sr
Jimmy Johnson
JR Robinson
Lenny Castro
Luis Conte
Michael Thompson
Mike Baird
Mike Landau
Mike Porcaro
Neil Stubenhaus
Paul Jackson Jr
Paulinho DaCosta
Randy Kerber
Robbie Buchanan
The Manhattan Transfer
Will Lee