First Playback of Audio, Edison's Tinfoil Phonograph
Thomas Edison’s recording of Mary Had a Little Lamb in upstate New York marks the first time in history that sound was recorded and played back. The recording itself is remarkable in that it survives to this day, and the excitement and surprise in Edison's voice is palpable, (he wasn’t convinced it would work).
Tinfoil Phonograph.” Tinfoil Phonograph - The Edison Papers. February 20, 2012. Accessed December 2, 2015. http://edison.rutgers.edu/tinfoil.htm.