Mikrophonie I, Kontakte, Klavierstück X, Zeitmasze

Concert date: 
Wednesday, December 9, 1964
Works performed: 
Klavierstück X
Kontakte with piano and percussion
Mikrophonie I
Concert venue: 
Palais des Beaux-Arts de Bruxelles
Programme text: 
handwritten in programme "Urauffuhrung Mikrophonie" Performers listed with error - Fritsch listed along with Kontarskys as piano. Spek listed as "technicien" with other performeres and not at the end. Stockhausen listed with no instrument.