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| General info : | | 12 inch (30,48 cm) is the standard diameter of vinyl phonographic albums (so called Long Players (LPs)) and laser discs (LD).
It is also the diameter of the so called 12-inch single (often simply called a 12").
When 2 such records are housed in one sleeve (regular or gatefold model) we name such a release a 2x12".
The 12-inch single is a type of gramophone record that has wider groove spacing and shorter playing time compared to typical LPs. This allows for louder levels to be cut on the disc by the cutting engineer, which in turn gives a wider dynamic range, and thus better sound quality. | |
| Source : | | https://en.wikipedia.org/wiki/12-inch_single (en.wikipedia.org/wiki/12-inch_single) | |
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