I'm looking for something to trigger samples and loops from my iPad. Ideally I could import and set up a bunch of labeled samples/patches, and then trigger and stop them with a button push. Some could be looped, some would be one-shot, and more than one could play at once. And it would be solid and easy to use in a live environment. I want to use this to trigger sound effects and segues between songs. Is there anything like this? I saw a demo of Akai iMPC, but I don't need all the drum-machine type features.