"Au Clair de la Lune"

It was the first sound ever recorded, by Édouard-Léon Scott de Martinville, in 1860, before Edison's wax cylinder experiments. Ironically, the "phonautograph" was designed only to record sounds, not to play them back.

The 10 seconds ghostly voice is a woman singing "Au Clair de la Lune".

Thomas Edison invented the tin foil phonograph.

            

While T. Edison was working on a telegraph transmitter, he noticed that when the tape of the machine played at a high speed it emitted a noise resembling spoken words.
During his experiments, he discovered that he could play back the short message he recorded, “Mary had a little lamb”