Electronic composition machine (not a synthesizer in the current sense of the word), developed by Helmut Klein and W. Schaaf at Siemens & Halske in Munich between 1956 and 1959. It was designed for and was the chief component of the Studio für Elektronische Musik in Munich, which Siemens began planning in 1955, initially to produce the soundtrack for a one-hour publicity film; it was linked to all the other equipment in the studio. A second model was installed in 1964. The director of the studio and the composer most closely involved with the Siemens Synthesizer was Josef Anton Riedl; others who used the machine included the composers Mauricio Kagel, Bengt Hambraeus, Milko Kelemen, and Ernst Krenek, and the sound poet Ferdinand Kriwet. The studio was taken over by a foundation in 1963, and its equipment was moved to Ulm in 1967; it was later acquired by the Deutsches Museum in Munich....
