Otto Joachim (born October 13, 1910) is a German-born Canadian musician and composer of electronic music. Born in Düsseldorf, he trained as a violinist at Düsseldorf and Cologne. In 1934 he left Germany and played in Singapore and Shanghai during the war years. He settled permanently in Montreal in 1949. For the next 15 years Joachim worked as a player, teacher, instrument builder and composer. Since the 1960s he has concentrated on his compositions which are a mix of aleatoric and electroacoustic works.

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