Hans-Joachim Roedelius (Hans-Joachim Rödelius, born October 26, 1934 in Berlin, Germany) is an German experimental / ambient / electronic musician. He best known as a co-founder of the German krautrock groups Cluster and Harmonia and his work in the ambient jazz trio Aquarello. As a child he acted in UFA films such as "...reitet für Deutschland" (Riding for Germany) (1941) and "Verklungene Melodie" (Dead Melody) (1938).

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