on a similar but slightly unrelated note, i was thinking about a concept that you might find interesting ben:
since we now have technology that can fairly efficiently map some of the electrical patterns in the brain for specific stimulus (visual, emotional, etc), and we have comptuer programs wherein someone who's hooked up to an EEG can control a mouse or a helicopter in a little game with just their mind/brainwaves, then
wouldn't it theoretically be possible to map out the electrical response in the brain to specific notes of music, and then if that's possible, translate the signals from imagining music in your head into MIDI notes and eventually music on a computer?
basically i'm fantasizing about being able to hook your head up to a computer and translate the music yuo hear in your head onto it.
thoughts?