Untouchable instruments and Performances

This paper is a report of new musical instrument/ interface in which the main concept is "untouchable". I will report on not only the system design but also on the performances as applications. The new musical instrument/interface is constructed with infrared rays distance sensors and optical distance sensors. In attending some concerts of computer music in the past, I was inspired with performances by hand-gesture, and the idea of "multi-channel Theremin" struck me. At first, I developed a new instrument "Peller-Min" as the 32channels Theremin. As the application of this instrument, I composed new work "controllable untouchableness" and performed twice in concerts. Secondly, I developed a new compact interface by the same concept. As the application of this interface, I composed new work "Ural Power" and performed in Russia.