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Consumer Electronics by S. P. Bali

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MAKING THE RECORD

When the master tape is played, its magnetic patterns are converted into electrical signals. These are fed through amplifiers to a cutter head on a lathe which converts these signals into mechanical motion and causes a cutting stylus to move as dictated by the signals on the tape. Thus, an incredibly complex groove is inscribed into a master disc. Moulds are then made from which the records are stamped.

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