Check this out! He and his light sensitive sound machine. And yes not only my negatives are light sensitive. Amazing performance in Villa K, here in The Hague. 

http://vimeo.com/88595140      “All sound come to live and are controlled by light, using ‘light efface’ instrument (find out more about it in this video: vimeo.com/59142013 ). Various light sources lend themselves to different sound manipulation techniques. ”