I intended to finish animating The Dream Hat and then compose background music for it, but as I would finish each scene and played it back, I could hear the music in my head, so I composed it as I went. I would lay down a track, hear a counter melody in my head and lay down that track. Usually in about a half hour I would have the background music composed and recorded for a scene.
I used some music symbolically:
For the Purple Man who held his breath for hundreds of years, I only used woodwinds (breath instruments). The percussion was wood blocks to sound like the ticking of a clock..
For Ralph and Louie, when they would speak in unison, I used a church choir. When they would fight, I would use a bell that symbolized both a church bell and a bell announcing the rounds in a boxing ring.