variPiano???: A parametric design variable piano visualizing a differential tuning mobile interface

This paper introduces the framework of mobile Computer Music interfaces within the context of Human Computer Interaction (HCI). It examines the unique problems posed by the use of computers by composers and performers of music. It emphasizes on the new various interfacing protocols, metaphors and paradigms that apply HCI design methodologies on the world of music, producing special modules like: performance instruments, digital audio processing tools, haptic - adaptable interfaces. A presentation of the basic concepts involved in the Computer Music world prevails the discussion on the evaluation criteria for Computer Music interfaces. New criteria are introduced, like knowledge representation of musical data and alternate musical interfaces materialization. A survey of various systems, based on the previously mentioned criteria is committed.