Vocoding

OK, now this is wicked.
In short, it re-tunes your vocals.
In more depth watch this:

(don't, it's boring)


But when you have mastered the art, look what you can do:





Schmoyoho have a few of these and their quite good.

I've already seen this used in a commercial sense, but God damn it, it was so spot on, I can't be mad.
Check out 'Jigsaw your voice' :