Technology
Before Edison, sound was recorded but not replayed
HERE’S THE INTERESTING PART
Decades before Edison, a Frenchman named Édouard-Léon Scott de Martinville successfully recorded human audio. The tragic catch? He had absolutely no way to play it back. His bizarre contraption captured sound waves by using a vibrating bristle to scratch squiggly lines into a layer of soot on wrapped paper. It was essentially a purely visual seismograph for human screaming.
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