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Scoop.it!
The Compact Cassette is a plastic case containing a spool of 3.81 mm magnetic tape spooled between two reels. The tape is run at a rate of 4.76 cm/second. A tape head in the tape player or deck, in contact with an exposed portion of the tape, interprets an analog signal from the tape's magnetic surface 
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Scoop.it!
SCHENECTADY, N.Y. (AP) — It's scratchy, lasts only 78 seconds and features the world's first recorded blooper.
The modern masses can now listen to what experts say is the oldest playable recording of an American voice and the first-ever capturing of a musical performance, thanks to digital advances that allowed the sound to be transferred from flimsy tinfoil to computer. The recording was originally made on a Thomas Edison-invented phonograph in St. Louis in 1878.
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