Here’s something you could blast out your window this Halloween. Akihiko Matsumoto plays with Max/MSP and creates an Audio to Midi set up. Ever since I owned a copy of the now discontinued Antares Kantos (Sound on Sound link) I’ve been playing with Audio to Midi stuff. Lately I have been using Melodyne to do the job. I’ve heard great things about zplane’s vielklang Audio to Midi function but haven’t personally tried it out yet.
Have you tried any Audio to Midi software?
For more info: http://homepage.mac.com/sinx_music/