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Aug 2017
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The talking machine is generally known as a phonograph or gramophone.
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Thomas Alva Edison conceived the principle of recording and reproducing sound between May and July 1877 as a byproduct of his efforts to “play back” recorded telegraph messages and to automate speech sounds for transmission by telephone. He announced his invention of the first phonograph on November 21, 1877, and he demonstrated the device for the first time on November 29, 1877.
posted on 04-10-2009