This doesn’t exist as a real product (yet) but let’s hope it moves from the prototype phase soon! Designed by Ben Bengler and Fiore Martin, the Collidoscope is a double granular synthesiser. Basically it lets two people play together at the same time (facing each other). Microphones and instant playback features would also allow sound to be manipulated in real time and in all kinds of ways. Really cool! Check out the demo video below!