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Consumer Electronics by S. P. Bali

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CHAPTER 8

DISC RECORDING AND REPRODUCTION

When Edision first developed phonograph recording, he used vertical motions of the recording stylus to record sound vibrations. This came to be known as the ‘hill and dale’ method of recording. However, the ‘hills’ in the record groove had to lift the playback arm and cartridge. Since early arms and cartridges were relatively heavy, this motion caused excessive wear and tear. The record industry, therefore, adopted the lateral recording method, in which the needle moves from side to side in accordance with the sound vibrations. All commercial monophonic records for home use are laterally recorded, and monophonic pickups are designed accordingly. The year 1946 marks the start of the disc hi-fi. The ...

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