Other April 9th 1860 (150 years ago today): French typesetter Edouard-Leon Scott de Martinville sings the French folk song “Au Clair de la Lune” to his phonautograph; producing the world’s earliest known sound recording Posted by Russel Tarr on April 9, 2010March 31, 2010 To listen to the recording, click here. Share this:Share this:LinkedInFacebookPinterest