This is the Sly Stone, Sun-Ra model, also seen in a few "Pulp"videos, and the new Depeche Mode Video. Different in it's percusive sound. The professional was also made as the "Professional-Duo", a dual manual instrument, and the "PRO 110", a dual manual with pre-sets, and teh Proffesional Piano, that had less tone generator sections. These were in prodution up-until the late '70s.

Controls are four sections of tones, "Clarinet", "Flute", "Sustain", and "Percussion". The "Flute", and "Clarinet" sections have on off switchs for eight pipe lengths. A two speed vibrato can be routed to all sections except percussion. The percussion section has a poly or mono attack switch, and a threeposition envelope release switch.