Back to the real DJ experience I mentioned... You can also use one of these little Pacemaker devices (mentioned here before) to do all your DJ business line beat matching, pitch, bass and treble adjustment on two virtual decks, allowing you also to fade between each deck at will.

http://www.engadget.com/2009/05/08/video-tonium-pacemaker-in-action/#continued


I saw this thing previewing on a different blog last year, but it looks like it may finally be available for wide-consumption.