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| CED in the History of Media Technology | ||||||||||||||
The earliest identified flat disc record was made by Sumner Tainter on November 8th, 1881 and is in the Smithsonian Institution collection. This record was made before there was even a practical device to play back a disc recording. The playback mechanisms tested had a tendency to destroy the wax grooves due to the tangential force that was not a problem in Edison's cylinder system. This disc uses lateral or zigzag grooves in contrast to the hill-and-dale grooves of the Edison cylinder.