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music especially composed for Expo'70 by contemporary German composers: Blancher, Eimert, Stockhausen, Zimmermann, and Zacher
Gorden Mumma has made concert tours and recordings in North and South America, Japan and Europe. His writings on the contemporary performance arts and technology are is published in several languages. As an electronic-music engineer he designed equipment for various institutions and individuals, including an electronic music system for EXPO-70 in Osaka, Japan.