Abstract
This paper introduces a multi-media performance system called "MoPH" that allows the user to enjoy playing graphics and sounds using an iPad. The computer graphics and sounds are generated based on the movement of "objects" that are subject to physical laws. Users of the MoPH define and interact with the object using the multi-touch functions of an iPad. We describe design concept and system of the MoPH. Through demonstrations and experiments of users, we consider effectiveness of the MoPH and its challenges of the future.