Gramophone record

A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to polyvinyl chloride), or simply record, is an analog sound storage medium consisting of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the periphery and ends near the center of the disc. Phonograph records are generally described by their size ("12-inch", "10-inch", "7-inch", etc.), the rotational speed at which they are played ("33 r.p.m.", "45", "78", etc.), their time capacity ("Long Playing"), their reproductive accuracy, or "fidelity", or the number of channels of audio provided ("Mono", "Stereo", "Quadraphonic", etc.).

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