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In december of 1877 Thomas Alva Edison create the phonograph.
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In 1888 Edison introduces an electric motor-driven phonograph.
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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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Enrico Caruso, an Italian operatic tenor, is hear in the first live broadcast from the Metropolitan Opera, NYC.
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The Radio Corporation of America is founded.
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Major Armstrong, the inventor of FM radio, makes the first experimental FM broadcast.
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Walt Disney's "Fantasia" is released with eight-track stereophonic sound.
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Sony produces the first pocket transistor radios.
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Philips introduces the Compact Cassette tape format, and offers licenses worldwide.
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Digital tape recording begins to take hold in professional audio studios.
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Philips demonstrates the Compact Disc (CD)
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Sony released the first CD player.
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Apple debuts the "QuickTime" multimedia format.
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DVD videoclips and players are introduced to the market.
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The audio has evolved and has adapted to all the electronic devices of our time like cell phones, computers, stereos, cars, etc., and achieves incredible effects in the movies and in the theater.
