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1930, Berlin___________Tratwein publishes his Elektrische Musik.
1930-1932, Dessau______Laszlo Moholy-Nagy (1895-1946), Oskar Fischinger, Trautwein, Paul Arma and other Bauhaus artists work with "drawn sound" and other sound-on film- techniques.
1931, Germany________Winifred Wagner commissions Mager to produce electronically synthesized bell sounds for the Bayreuth production of Parrsifal.
1931, USA___________Henry Cowell devises an electric instrument that is built by Theremin. Called the rhythmicon, it plays metrical combinations of unlimited complexity. He compose a concerto for it, Rythmicana.
1932, NY____________Leopold Stokowski addresses the Acoustical Society of America, calling for a collaboration among physicists, musicians, and psychologists, and predicts a time when a composer "can create directly into Tone, not on paper."
1933-1937, Paris______Maurice Jaubert (1900-1949) and Arthur Honegger (1892-1955) manipulate soundtracks for motion pictures.
1934, Paris___________Russian mystic and composer Nicolas Oboukhov (1892-1954) supervises the construction of his "Croix sonore," an electric instrument in the form of a cross.
1934, NY____________Varese commissions two electronic instruments from Theremin for use in Ecuatorial. The instruments have a range up to 12544.2 cycles.
1935, Germany_______Manufacturer company Allgemeine Elektrizitats Gesellschaft (AEG) builds and demonstrates the first tape recorder using magnetic tape, the "Magnetophon." It was designed by Fritz Pfleumer.
1936, NY____________Varese experiments with phonographs that could be operated backward and at variable speed.
1937, Mexico/NY______Carlos Chavez calls for a collaboration among engineers and composers in his book, Toward a New Music. He prophesizes elimination of performers as middlemen between composers and listeners, through sound film.
1937, France__________Olivier Messian writes Fetes des belles eaux, for six ondes (designed by Martenot).
1938, Berlin__________Harold Bode builds the electric "Melodium."
1939, Seattle__________John Cage realizes his Imaginary Landscape No. 1 at the radio studio of the Cornish school. His article "Goal:New music, New Dance" is published in Dance Observer.
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