Photoelectric musical instrument
作者： Rollin E Campbell
DOI:
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摘要:
lens.org 参考文章(5)
Ralph K Potter, Method and apparatus for producing musical sounds ,(1926)
Ralph K Potter, Producing musical sounds ,(1929)
Eremeeff Ivan, Photoelectric musical system ,(1934)
Ranger Richard Howland, Apparatus for producing musical sounds ,(1931)
Galan W Demuth, Keyboard for musical instruments ,(1944)