Josef Anton Riedl (11 June 1929, in Munich [1927 is also given as his year of birth] – 25 March 2016 in Murnau am Staffelsee) was a German composer.

German composer Josef Anton Riedl, an electronics pioneer who wrote part of the perfect score for Edgar Reitz’s Heimat series on TV. Riedl, who was 86, was among the first foreign musicians to work with Pierre Schaeffer in Paris on musique concrete, in 1953. He headed the Siemens electronic studios in the 1960s and went on to initiate many series of challenging music. - See more at: SLIPPED DISC Following a period of studies at the Hochschule für Musik und Theater München and in courses given by Hermann Scherchen in Gravesano, Riedl, influenced by Carl Orff und Edgar Varèse, devoted himself as a composer particularly to percussion and Lautgedichte (sound poetry) (Schmidt 2001). In 1950 he was co-founder of the German Section of the Jeunesses Musicales, together with Herbert Barth, Reiner Bredemeyer and Eckhart Rolfs (Schmidt 2001). Starting in 1952 he did pioneering work in the use of concrete and electronic sounds, joining Pierre Schaefer’s Groupe de Recherche Musicale in 1953 (Schmidt 2001). In 1955 he worked in the electronic studio of NWDR in Cologne, and spent some time in 1959 in Scherchen’s experimental studio in Gravesano (Schmidt 2001). From 1959 until its closure in 1966 Riedl was director of the Siemens Studio for electronic music (Schmidt 2001). The concert series Neue Musik München / Klang-Aktionen initiated by Riedl in 1960 (Schmidt 2001) continues to this day. WIKIPEDIA

 VIDEO: Josef Anton Riedl (*1929): Polygonum (1968). Performers: Simone Rist and Nicolaus A. Huber. Polygonum consists purely of improvisation to an improvisation.