SCHENECTADY, N.Y. (AP) - Researchers have recovered and digitized what experts say is the oldest playable recording of an American voice and history's first-ever recorded musical performance. Also included: the first recorded blooper. The recording was done on a sheet of tinfoil on a phonograph invented by Thomas Edison and made in St. Louis in 1878. It opens with a short cornet solo and is followed by a man reciting nursery rhymes. Near the end of the 78-second recording, the man laughs after messing up one of the words to "Old Mother Hubbard." The tinfoil and the newly digitized recording was played publicly Thursday by a museum in Schenectady (skeh-NEHK'-tuh-dee), N.Y., where Edison founded the General Electric Co. Experts at California's Berkeley Lab recovered the recordings using technology developed for the project.