Over the last three years I have been making an instrument to convert sound to light using reflected and refracted lasers. The idea was to create a synesthesia between light and sound. Now with over 700 lasers it is arranged as three self contained units that project onto a white surface 5 to 10 meters away. It requires as much darkness as possible and takes 2/3 hours to set up. The lasers and the motors that turn them (or the object in front of them) are all controlled via midi making it a sort of light organ that creates something nobody has seen before. https://funkiporcini.net/things/news/the-laserium/