Cut and pasted from wikipedia.org
Interesting history regarding movie first!
"Not only did Fantasia establish animation as a true art form, it also introduced film audiences to multi-channel sound, which played an important part in Fantasia. After the completion of The Sorcerer's Apprentice, Stokowski enlisted the Philadelphia Orchestra, of which he was the conductor, to record the music for the six remaining segments. Walt Disney was present on the sound stage during an early session, and was very pleased with what he was hearing until he heard the playback from the recording engineers. He felt the recorded version of the music sounded tinny and undynamic, and asked his engineers to see what they could do about developing a better sound system. The engineers, led by William E. Garity, responded by creating a multi-channel sound format they called Fantasound, making Fantasia the first commercial film ever to be produced in a form of stereophonic sound. The film also marked the first use of the click track while recording the soundtrack, overdubbing of orchestral parts, and simultaneous multi-track recording.
Always wanting to try new things, Walt Disney also had plans to film Fantasia in widescreen, to have the Toccata and Fugue be filmed to be 3-D and to spray different perfumes into the theater at appropriate times during the Nutcracker Suite, but those plans were never carried out."