I wasted even more time bending, folding and mutilating audio into bits than I wasted on animations/video. The bits were all intended to be looped, and could be played on multiple players going at once (which could in turn be recorded). The names of files reveal some sources, and there's no good reason to reveal them here.
One thing I really enjoyed was distorting bits with software utilities that came with SoundBlaster audio cards. I could nearly see the "alien" voices spawned from harsh treble, reverb and other distortions -- still some of my best, most intense memories.