Beta is vocoding. Also has ring modulation so that you can pretend you're one of the Daleks on Doctor Who. See the Nightwaves review of it. I've made a few musical bitmaps and rendered wav's from all sorts of cool images, as well as text. If you ever listen to a song of mine that sounds like a robotic birdsong, put it through a spectral display like in Cool Edit 96 or something.
Chances are it was made with Coagula.
See the Nightwaves review of it.