 They later also experimented with different genres and sound collages, including electronic devices.The duo played in many international festivals and concerts in cities as diverse as Tel Aviv, Zagreb, West and East Berlin and South America.Before the duo started, Heiner Goebbels especially admired the capabilities of Don Cherry, with whom about 15 years later he engaged in his project “Der Mann im Fahrstuhl,” adapted from Heiner Müller.