Abstract
THE paper read before the Royal Society of Arts on March 4 by Mr. G. G. Blake on electrically produced music considered only those instruments which depend on the method known in radio as the ‘heterodyne’. Mr. Blake showed first the production of beat notes by two musical instruments. When they were both vibrating at the same frequency they emitted the same note. By gradually altering the frequency of one of the instruments, a third—the heterodyne—note could be heard. As the instruments went more out of tune, the frequency of the beat note became higher. This showed the heterodyning of sound waves.
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Electrically Produced Music. Nature 137, 588 (1936). https://doi.org/10.1038/137588a0
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DOI: https://doi.org/10.1038/137588a0