Until the 1980s most popular music had come into homes in the form of records. But traditional sound recording had been done in analog, a continuous waveform which is theoretically capable of producing an exact replica of the sound recorded, but which...

A Compact Disc player (often written as compact disc player), or CD player, is an electronic device which plays audio Compact Discs. CD players are often installed into home stereo systems, car audio systems, and personal computers. They are also...