One Note Tony is a 1947 Terrytoons cartoon.
Animals present a symphony orchestra concert in the jungle. The monkey tympani player is One Note Tony, who only gets to hit his one note as written by the lion conductor. When an elephant captures more notes from the air and shoots them over Tony's music page, he turns the stuffy concert into a swing session. The band comes alive with the jazzy rhythm, and the audience of animals is jitterbugging in the aisles. Tony is proclaimed the Swing King and carried off in triumph!