Electronic music pioneer Jean-Jacques Perrey appears on "I've Got a Secret" (November 21st, 1966) with host Steve Allen and panelists Betsy Palmer, Bill Cullen, Bess Myerson, and Henry Morgan.
After several other musicians are introduced along with their instruments (violin, French horn, bagpipe, clarinet) we learn that Perrey's secret is "I play one instrument that can sound like all of these."
After the game, that instrument is revealed to be the Ondioline, an early synthesizer-like keyboard instrument. He demonstrates that it can indeed mimic the sounds of the others and make unique sounds of its own.
Perrey and his collaborator Gershon Kingsley, with whom he recorded the 1966 album "The In Sound from Way Out", then play one of their compositions.