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Consumer Electronics by S. P. Bali

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CHAPTER 14

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 of hi-fi stereo sound. The compact disc spins at a high rate of speed compared with a conventional audio record, and uses a light beam/optical pick-up instead of the standard stylus/needle pick-up arm. In addition to superior sound can provide immediate access to audio at any part of the disc. It is also possible to program CD players to play only selected portions of the audio ...

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