![]() ![]() That a CD player reads using a laser beam. Surface of the disc in the form of microscopic bumps (called pits) Compact discs store musicĭigitally as well, but the numbers are "pressed" into the shiny Music players are slightly different: they record the digits that represent musical sounds using tinyĮlectronic switches known as transistors. Hard drives read and record information using magnetism: a movingĮlectromagnet-arm reads and writes tiny magnetic zones by sweepingīack and forth across a rapidly spinning disc. Takes up very little space (which means you can download it quickly). Into long strings of numbers and compressed mathematically so it (numeric) format, with all the individual sound frequencies converted USB sticks and digital camera memory cards). Stores your music on an internal hard-drive or If you have an MP3 player, such as an iPod, it ![]() Just another kind of information: they can store text files, videos, and photos Modern music players are essentially specialized computers that store sound as
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