OPTICAL RECORDING AND REPRODUCTION Compact disc (CD) players are a very specialised form of phonograph, record player, or turnable. A CD player plays pre-recorded discs (carrying music, speech, etc.) through a conventional hi-fi or stereo system (amplifier and loudspeakers). The disc is single-sided, 4.75 in (120 mm) in diameter, and can contain upto 60 min […]
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