in april 1860, some french dude named Édouard-Léon Scott sang Au clair de la lune using a phonograph he build in the 1850s. This is the OLDEST sound but not the FIRST however. In 1853,the same person [but 7 years younger lol] recorded a guitar with became the first sound recording. however sadly, it has been lost. because it has been destroyed BY ACCIDENT BEFORE DISCOVERING.