sCrAmBlEd?HaCkZ! is a program for mixing sound and video snippets taken from any (music) video source into a new audio-visual experience, based on any audio input, and in realtime. The promo video gives the best summary of what it does and how, and also has an example of the software being used. This is fab, and hopefully the software will soon be released (as GPL for open-source developement) so we can all have a go!