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What does compact disc (CD) consist of?

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As originally developed for audio systems, the sound signal is sampled at a rate of 44,100 times a second, then each sample is measured and digitally encoded on the 4 3/4 in (12 cm) disc as a series of microscopic pits on an otherwise polished surface.

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Get more facts and information about compact disc . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

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