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Thomas Alva Edison, working in his lab, succeeds in recovering Mary's Little Lamb from a strip of tinfoil wrapped around a spinning cylinder.1877
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AUDIO
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The first music is put on record: cornetist Jules Levy plays "Yankee Doodle
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Clement Ader, using carbon microphones and armature headphones, accidentally produces a stereo effect when listeners outside the hall monitor adjacent telephone lines linked to stage mikes at the Paris Opera
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Emile Berliner is granted a patent on a flat-disc gramophone, making the production of multiple copies practical
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dison introduces an electric motor-driven phonograph
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Valdemar Poulsen patents his "Telegraphone," recording magnetically on steel wire
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Poulsen unveils his invention to the public at the Paris Exposition. Austria's Emperor Franz Josef records his congratulations
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Marconi successfully experiments with his wireless telegraphy system in Italy, leading to the first transatlantic signals from Poldhu, Cornwall, UK to St. John's, Newfoundland in
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Lee DeForest invents the triode vacuum tube, the first electronic signal amplifier
