With his machine he can lift out the source of the sound, split it up, reverse it, slow it down or speed it up—in fact, do just about anything to alter it. To hear the result is to begin to distrust your ears, just as in Op Art you begin to distrust your eyes. The effect is overwhelming. The message which comes across from the distortion is the same as in modern painting. All is relative, nothing is sure, nothing is fixed, all is in flux. Musique concrète is just one more way of presenting the uniform