How can you try DJ Hero 2 without a turntable peripheral and a console? By going to the DJ Hero website on your PC and playing a specially crafted mini-game. That's how.
You'll be asked to do three things: press a mouse button when the little circled notes travel past you; press either the left or right arrow keys (or A or D keys) in the direction the coloured line bends; and hold the mouse button down and run the mouse backwards and forwards to scratch.
I played Lady Gaga Ft. Colby O'Donis versus Deadmaus and scored 1245. Can you beat me? Unlikely.
The mini-game isn't quite DJ Hero 2 - due out 29th October - but the demo should give you a good idea of the funky music on offer and the game's controls.