Get your first look at the brand-new trailer for Dumbo during the CMA’s tonight at 8p on ABC Television Network. | Disney Channel

Behind the scenes of Dumbo, Disney artists like Jimmy MacDonald recorded sounds using manual Foley techniques, performing various effects live to the animation using everyday objects and custom props. The unique, mechanical-sounding "all aboard" phrase from the Casey Jr. train was a pioneering use of an early device called the Sonovox, which modulated a whistle sound with a human voice actor's mouth movements. Credit: Disney | History In Pictures