electronic recording

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The preservation of information by a process of electromagnetism whereby a signal consisting of a series of modulating voltages is fed through an electromagnet (the record head) which selectively magnetizes the ferromagnetic particles coating the surfaces of the recording medium: either audio or video tape, or a computer hard drive. These particles reproduce the same voltages when another electromagnet (the playback head) is passed over them, thereby reconstituting the signal. See also analogue; compression; digital; generation loss.

Subjects: Media Studies.

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