Episode details
Radio 4,2 mins
Voices from the 1860s
Available for over a year
A de Martinville "phonautograph" (pictured here) recording revealed a young girl singing Au clair de la lune. Announcing this discovery on the 91¸£ÀûÉç caused Charlotte Green to corpse – but this wasn't the end of the story. The historians who made the recording had played it at the wrong speed...
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