For the premiere, the Broadway theatre in New York was equipped with "Fantasound," a stereophonic sound system that used a total of ninety speakers.

Mickey Mouse has eyes with pupils for the first time on screen.

Disney digitally re-recorded the soundtrack for the 1984 re-release because the original Stokowski soundtrack from 1940 sounded dated and very limited in fidelity. But for the 1990 50th Anniversary (re-) re-release of Fantasia, Disney reverted to the original soundtrack from 1940, which they cleaned up as best as possible (although the limited fidelity could not be corrected) and this is the soundtrack the film has today.

During production of Fantasia, the animators were given no instructions for coloring. Walt Disney instructed them to use any colors they wanted, a first.

Originally, Pierne's "Cydalise" was to have been the musical choice for the Greek mythology setting, but Walt Disney decided it wasn't expressive enough for the story, so Beethoven's "Pastoral Symphony" was chosen instead.

Walt Disney originally wanted to re-release Fantasia each year with a new music segment, but this proved overambitious. Among the pieces that were at least storyboarded for insertion were Sibelius' "Swan of Tuonela," Wagner's "Ride of the Valkyries," Rimsky-Koraskov's "Flight of the Bumblebee," and Weber's "Invitation to the Waltz" (a new concept that would have starred Peter Pegasus from the "Pastoral" segment).

On the 1982 digital re-recording of the soundtrack, Irwin Kostal decided to use Mussorgsky's original orchestration (which was previously unpublished until 1968) of "Night on Bald Mountain," which is said to be much fiercer than the version orchestrated by Rimsky-Korsakov that was used by Stokowski on the original.

The Sorceror (in ``The Sorceror's Apprentice'') is named ``Yen Sid'', which is ``Disney'' spelled backwards.

The demon in ``Night on Bald Mountain'' was supposedly modeled on Bela Lugosi. It was named ``Chernobog'' after the god of evil in Slavonik mythology.

A segment featuring Claude Debussy's ``Clair de Lune'' was animated but cut.

The soundtrack was re-recorded for the film's 50th anniversary.

In the ``Pastoral Symphony'' segment there was originally a scene showing black centaurs shining the hooves of white centaurs. It was not until the 1969 rerelease that this was thought objectionable, and all subsequent releases until 1980 had an abrupt cut at this point. The current video release includes the scene, but with the frame cropped to show only the face of a white centaurette.