What was the first song ever recorded?

Mary had a little lamb by Thomas Edison

Correction:

In March 2008 a recording by Frenchman Edouard-Leon Scott de Martinville of a woman singing 'Au Clair De La Lune' was discovered in an archive in Paris by a group of American audio historians. The recording dates back to April 9, 1860 making it the world's first known recorded song.

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