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The flexi disc (also known as a phonosheet, Sonosheet or Soundsheet, a trademark) is a phonograph record made of a thin, flexible vinyl sheet with a molded-in spiral stylus groove, and is designed to be playable on a normal phonograph turntable. Flexible records were commercially introduced as the Eva-tone Soundsheet in 1962.
At the time, as a cost-cutting measure, most industry record pressing plants were using recycled or "reground" vinyl, taking old and unsold records, cutting out the center with the paper labels, then melting the rest down and reusing the material to make new records. Such "reground" vinyl records typically sounded much noisier and scratchier ...
Most sound recordings for records before the 1950s were made by cutting directly to a master disc. Recording via magnetic tape became the industry standard around the time of the creation of the LP format in 1948, and these two technological advances are often seen as being joined, although 78 rpm records cut from tape masters continued to be manufactured for another decade.
An obi (Japanese: 帯) is a strip of paper looped around a book or other product. This extends the term obi used for Japanese clothing; it is written with the same kanji . It is also referred to as a tasuki ( 襷 , another kimono accessory) , or more narrowly as obigami ( 帯紙 , "belt paper") .
Most noticeably, vinyl records are comparatively lightweight and flexible, while lacquers are rigid and considerably heavier because of their metal cores. Lacquers commonly come in three sizes: 10-inch (25 cm) discs for singles and 14-inch (36 cm) discs for albums as well as 12-inch (30 cm) discs for LP references and for 10" master cuts.
The LP (from long playing [2] or long play) is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33 + 1 ⁄ 3 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.
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