What French folk song was faintly sung in the 1860 recording recovered from Scott's phonautogram?

Answer

Au clair de la lune

The oldest known recording of a human voice, made in 1860 using the phonautograph, features Scott faintly singing the French folk song, 'Au clair de la lune'.

What French folk song was faintly sung in the 1860 recording recovered from Scott's phonautogram?

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