Fantasia

Fantasia is a 1940 American animated musical anthology film produced by Walt Disney, the third feature in the Walt Disney Animated Classics canon. It pairs eight pieces of classical music -- conducted by Leopold Stokowski with the Philadelphia Orchestra -- to elaborate animated sequences, ranging from Mickey Mouse as "The Sorcerer's Apprentice" to Mussorgsky's "Night on Bald Mountain". A pioneering experiment in stereophonic sound (Disney's "Fantasound" system) and in marrying visual art to symphonic music, it remains one of the studio's most ambitious productions (Wikipedia)