 The horn section in "Hang Up Your Hang-Ups" plays repeated riffs in unison that alternate with and are answered by electric piano, synthesizer, and electric guitar in brief periods of call and response.Paul Jackson, Bill Summers, Harvey Mason, Bennie Maupin, and Mike Clark (who replaced Harvey Mason post-1974) formed the core of the group the Headhunters with which Hancock had toured and recorded for the previous three years.This was their final album as a group.