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Lee DeForest invents the Triode Vacuum Tube which led to amplification of electrical signals.
1906 -
1930's Improvement of amplifiers and invention of the Tape Recorder. John Cage composes Imaginary Landscape no.1 (1939) and no. 2 (1942) using test-tones from recordings, which were played on variable-speed turntables.
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Telharmonium invented
1887 -
1948 RTF This marks the beginning of studio realizations and musique concrete.
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1952 Four compositions for tape recorder
Raymond Scott designs possibly first sequencer which consisted of hundreds of switches controlling stepping relays, timing solenoids, tone circuits and 16 individual oscillators. -
1958 Varese Poeme Electronique played over 400 loudspeakers at the Phillips Pavillion of the 1958 Brussels World Fair.
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1959 Columbia-Princeton Studio established in New York with the help of a $175,000 Rockefeller grant. Incorporated the RCA Mark II synthesizer, the first major voltage-controlled synthesizer
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1967 Max Mathews and F. Richard Moore develop GROOVE, a real-time digital control system for analog synthesis, used extensively by composers Laurie Spieglel and Emmanuel Ghent in the 1970's.
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•1970's Mini-Moog, a small affordable integrated synthesizer make analog synthesis easily available and affordable, along with newcomers ARP and Oberheim