The Reactable Experience is an innovative electronic musical instrument that enables everyone to experiment with sound, change its structure and be creative in a truly engaging, fun and visually appealing way. http://www.reactable.com
Clavilux 2000 - Interactive instrument for generative music visualization
an interactive instrument for generative music visualization, which is able to generate a live visualization of any music played on a digital piano. Colours give the viewer and listener an impression of the harmonic relations: Each key has it's own color scheme and "wrong" notes stand out in contrasting colors.