Videos of earlier prototypes
This is the first prototype that we showed at NAMM in 2006. There was a lot of interest in the idea but this version used a servo to swing the beam and the noise that it made (albeit minimal) was an issue for studio use.
This was an second version that gets it's power from Midi. This version used a galvanometer to provide motion and was absolutely silent, but it was extremely fragile and wouldn't survive being dropped.