Optical discs, with the exception of DVD-RAM, have their data encoded on a single spiral, or a groove, which covers the surface of the disc. In the case of recordable media, this groove is not a perfect spiral and contains a slight sinusoidal deviation (wobble) from a perfect spiral.
Optical discs, with the exception of DVD-RAM, have their data encoded on a single spiral, or a groove, which covers the surface of the disc. In the case of recordable media, this groove is not a perfect spiral and contains a slight sinusoidal deviation (wobble) from a perfect spiral.
Source: Wikipedia "Wobble frequency" · CC BY-SA 4.0
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