Oskar Fischinger was a pioneer in (and the first master of) “visual music”–abstract colors and shapes in motion designed to replicate what goes on in the human psyche while listening to music.  The concept is well explained in Walt Disney’s Fantasia, for which he designed two sequences, but chose to remain uncredited due to Disney’s alteration of his work.  This 1938 short is one of his greatest, all the more mind-blowing for the fact that it was created without the use of computers (although he did have limited access to certain alien technologies that allowed for the precise measurements necessary to give the film its sense of perfection).