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The Compact Cassette or Musicassette (MC), also commonly called cassette tape, audio cassette, or simply tape or cassette, is an analog magnetic tape recording format for audio recording and playback. It was released by Philips in 1962, having been developed in Hasselt, Belgium. Compact cassettes come in two forms, either already containing content as a pre-recorded cassette, or as a fully recordable "blank" cassette.Compact Cassettes contain two miniature spools, between which a magnetically coated, polyester-type plastic film is passed and wound.These spools and their attendant parts are held inside a protective plastic shell. Two stereo pairs of tracks (four total) or two monaural audio tracks are available on the tape; one stereo pair or one monophonic track is played or recorded when the tape is moving in one direction and the second (pair) when moving in the other direction. This reversal is achieved either by manually flipping the cassette, or by having the machine itself change the direction of tape movement and head respectively ("auto-reverse").
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