Generated merging the image created by a laser and the electron beam of the analog screen of a Vectrex (game console from the '80s). The Vectrex beam is fast and can draw many lines but it's monochromatic, while the laser can draw few lines but it has beautiful colors. I deflecting their blue beam horizontally, vertically and in intensity using sound signals. The sound you hear is the signals that generate the image. More info on my technique: www.jestern.com