Comment by notresidenter

For anyone interested, the earliest sound recorded is from 1860, and isn't from Edison, but from a Frenchman Édouard-Léon Scott de Martinville, on a machine he called the "Phonoautograph". The machine recorded "traces" which a team at Stanford managed to convert back into sounds in 2008: https://www.archeophone.com/artists/s/edouard-leon-scott-de-...