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How do CDs work?
CDs are read by a laser in the player as they spin. The discs contain a series of pits that change the way the laser reflects off the disc.

When the laser reflects back to the reader, this is seen as the number "1". When the light is reflected away, it is seen as a "0". When these 1's and 0's are combined together, you get the parts that make up digital music.

A CD player reads the disc from the center out, unlike a record which reads from the outside to the center. At the core of the CD, there is a directory of where everything is stored. This is how a CD player knows where all the tracks of music are.

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