| http://www.w3.org/ns/prov#value | - ph demonstration held June 22, 1878, in St. Louis, museum officials said.Chris Hunter, curator at the Museum of Innovation and Science, plays a 1878 tinfoil recording on a computer on Wednesday, Oct. 24, 2012, in Schenectady, N.Y. Researchers have digitized what experts say is the oldest recording of a playable American voice and history???s first-ever recorded musical performance, along with the
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