I'm looking for an ipad app for playback purpose. since there's so much app out there for ipad now, it must just be hiding somewhere from me. is there any app with UI, that you can set to many big columns or rows, and have the ability to set a track on the box on it. tabbing on the box from the columns/rows will trigger a play/pause. double tab to stop. mainly for playback purpose. Anyone know of such or similar app for ipad around?