Erwin Schulhoff 'In Futurum' (1919) Live

This is one of the Erwin Schulhoff's Dadaism works.
He composed many jazz-inspired piano works but soon after WWI, he wrote some dadaism-inspired works like 'Sonata Erotica'.

In This work, All notes are written as rest notes! The others consist of the score are some faces, ! ,and ?. More than 30 years before John Cage's "4:33", he wrote "Music Without Sound".

Part of the score is here.
http://homepage1.nifty.com/iberia/score_gallery_schulhoff.htm
(Recently, the comercial score is published from Prism Inc., Japan.)

On my preparation, I totch the keyboard but don't utter the sound (In this performance, I mistakely tone of C ,once).
And I express '!' as the gesture of being suprised.