A Corny Concerto (1943)

A Corny Concerto features music that was composed by Johann Strauss, and was intended as a parody of Disney's Fantasia. The cartoon is narrated by Elmer Fudd, parodying Deems Taylor's appearance in Fantasia.
In 1994 it was voted #47 of the 50 Greatest Cartoons of all time by members of the animation field.