French printer, bookseller and inventor of the earliest known sound recording device known as the phonautograph.
The oldest recorded human voice is of someone singing the French folk song, “Au clair de la lune”, on the phonautograph.
French printer, bookseller and inventor of the earliest known sound recording device known as the phonautograph.
The oldest recorded human voice is of someone singing the French folk song, “Au clair de la lune”, on the phonautograph.