The Chord Board is a revolutionary musical instrument that simplifies and expands on the traditional piano-style keyboard interface through the use of computer technology. Musicians skilled or unskilled alike will be able to take advantage of this new musical interface which makes the playing of an unlimited...http://www.google.fr/patents/US5440071?utm_source=gb-gplus-shareBrevet US5440071 - Dynamic chord interval and quality modification keyboard, chord board CX10
Dynamic chord interval and quality modification keyboard, chord board CX10
