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Magnetic tape can be used to store analogue or digital information (DAT or digital audio tape).
Magnetised particles in the tape store the encoded information.
The tape recorder has a record head which magnetises particles in the tape into a particular pattern to represent the sound (and images)
The playback head senses the direction that the particles are magnetized and generates a matching varying current. This analogue signal is decoded by the electronics in the amplifier and output as sound (and images)
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