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A twelve-inch Capitol Records gramophone record. The twelve-inch single (often written as 12-inch or 12″) is a type of vinyl (polyvinyl chloride or PVC) gramophone record that has wider groove spacing and shorter playing time with a "single" or a few related sound tracks on each surface, compared to LPs (long play) which have several songs on each side.
LP record. The LP (from long playing [1] or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33⁄ rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk.
The most common diameter sizes for gramophone records are 12-inch, 10-inch, and 7-inch (300 mm, 250 mm, and 180 mm). [1] Early American shellac records were all 7-inch until 1901, when 10-inch records were introduced. 12-inch records joined them in 1903. [2] By 1910, other sizes were retired and nearly all discs were either 10-inch or 12-inch ...
Sizes of records in the United States and the UK are generally measured in inches, e.g. 7-inch records, which are generally 45 rpm records. LPs were 10-inch records at first, but soon the 12-inch size became by far the most common. Generally, 78s were 10-inch, but 12-inch and 7-inch and even smaller were made—the so-called "little wonders". [82]
Single (music) Common forms of physical music singles. A 7-inch vinyl record single. A CD single (12cm/"full-size") In music, a single is a type of release of a song recording of fewer tracks than an album or LP record, [1] typically one or two tracks. A single can be released for sale to the public in a variety of physical or digital formats.
The most common size of LaserDisc was 30 cm (11.8 in), approximately the size of 12 in (30.5 cm) LP vinyl records. These discs allowed for 30/36 minutes per side (CAV NTSC/PAL) or 60/64 minutes per side (CLV NTSC/PAL). The vast majority of programming for the LaserDisc format was produced on these discs.
Around 1910, 78-rpm records replaced the phonograph cylinder as the medium for recorded sound. The 78-rpm records were issued in both 10- and 12-inch diameter sizes and were usually sold separately, in brown paper or cardboard sleeves that were sometimes plain and sometimes printed to show the producer or the retailer's name.
After the records were plated they were mounted in aluminum containers and delivered to JPL. [27] [28] The record is a copper disk 12 inches (30 cm) in diameter plated first with nickel and then gold. [3] The record's cover is aluminum and electroplated upon it is an ultra-pure sample of the isotope uranium-238.