Record surface, light micrograph

Record surface, light micrograph

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Caption: Normarski differential interference contrast (DIC) light micrograph of the surface of a vinyl record, showing the grooves. The nature of the groove varies with the intensity of the music: the straighter the groove the quieter the music, the more wavy the groove the louder the music. The stylus travels through the groove & picks up the music modulation from the sloping sides; it is transmitted to the cartridge where a piezoelectric crystal or an electromagnet converts the vibration into an electrical signal. The grooves shown here are from the 1974 Elton John record "Lucy in the sky with diamonds". Magnification: x50.

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Keywords: audio, contrast, dic, disc, groove, grooves, interference, items, music, plastic, record, sound, surface, technological, technology, track, tracks, vinyl

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