Au clair de la lune recording

However, in March 2008, researchers rediscovered Scott de Martinville's recording and sent it to the Lawrence Berkeley National Laboratory, where they used a computer program to convert it into audible sound.

[4] In 1853 or 1854, French inventor Édouard-Léon Scott de Martinville conceived the idea of creating a sound reproduction system after studying a diagram of the human ear.

Inspired by this, he began developing what he termed "le problème de la parole s’écrivant elle-même" ("the problem of speech writing itself"), aiming to replicate the ear's capacity to capture and reproduce sound.

[6][7] By 1857, with support from the Société d’encouragement pour l’industrie nationale, the phonautograph had advanced to a point where it could record sounds with sufficient accuracy.

[8][3] Sound engineers initially played the phonautograms at a speed that resulted in a 10-second snippet, which seemed to feature a woman or child singing or humming a tune.