1888-1988: A Hundred Years of Magnetic Sound Recording
In the past, the essay "Some Possible Forms of Phonograph" by the American engineer Oberlin Smith, dating from 1888, has been regarded merely as a first indication of the possibility of electromagnetic sound recording. A recently discovered reader's letter proves that Smith constructed a unit with functional transducers, which could at least be used for experimental purpose, and is therefore the inventor of magnetic sound recording technique.
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