"A gramophone record (also known as phonograph record, or simply record) is an analog sound storage medium consisting of a flat disc with an inscribed modulated spiral groove usually starting near the periphery and ending near the centre of the disc."
Wikipedia, Tim's Phonographs and Old Records, History of Antique Phonographics 1877-1957, YouTube, (1)
Wikipedia, Tim's Phonographs and Old Records, History of Antique Phonographics 1877-1957, YouTube, (1)
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