I just took delivery of the new Korg Kaosillator and threw it in my computer bag for a business trip. I got to my hotel room and stuck in my headphones from my iPod. I AM BLOWN AWAY WITH THE SOUND AND EASE OF USE!! I buy a lot of gear but this is one of the first that has just stunned me. It has no input jack and can't be triggered by an external source, the control surface is awesome however. Well worth the money!