Erwin Schulhoff : In Futurum, Part III from 5 Pittoresken (1919) - YouTube

https://www.youtube.com/watch?v=FBfOG0D39eo

3d movement of Erwin Schulhoff's '5 Pittoresken für Klavier op.31' (1919), a silent piece of music, written 33 years before John Cage wrote his famous 4'33"....