Feedback Studio Verlag Köln

After the 1970 World Expo Osaka three composers and collaborators of Karlheinz Stockhausen, Johannes G. Fritsch, Rolf Gehlhaar and David Johnson (4) founded the Feedback Studio, Köln. Later, in 1971, Fritsch and Gehlhaar opened the Feedback Studio Verlag, the first German composer owned publishing house, which now publishes more than 300 compositions representing 20 contemporary composers.