4 carousel slide projectors each with 81 slides
4 contact microphones
projection approx 240 x 360 cm each
Slides projected from two projectors at once are superimposed in a corner of the room and are very rapidly changed (approx every 2 - 3 seconds).
The timers of the projectors have all been adjusted to different speeds. As a result, the combination of images superimposed is fortuitous and different with each turn.