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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 with the stereo.
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Edison introduces an electric motor-driven phonograph.
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Steros are becoming big.
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Valdemar Poulsen patents his "Telegraphone," recording magnetically on steel wire
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Lee DeForest invents the triode vacuum tube, the first electronic signal amplifier.
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Major Edwin F. Armstrong is issued a patent for a regenerative circuit, making radio reception practical.
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Independently, engineers in Germany, Japan and the U.S. discover and develop AC biasing for magnetic recording.
Western Electric designs the first motional feedback, vertical-cut disk recording head.
Major Armstrong, the inventor of FM radio, makes the first experimental FM broadcast.
The first of many attempts is made to define a standard for the VU meter. -
The Audio Engineering Society (AES) is formed in New York City.
The microgroove 33-1/3 rpm long-play vinyl record (LP) is introduced by Columbia Records.
Scotch types 111 and 112 acetate-base tapes are introduced.
Magnecord introduces its PT-6, the first tape recorder in portable cases.
