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Vinyl LP preservation is generally considered separate from conservation, which refers to the repair and stabilization of individual discs. Commonly practiced in major sound archives and research libraries that house large collections of audio recordings, it is also frequently followed by audiophiles and home record collectors.
The Dakeyne hydraulic disc engine was a high-pressure hydraulic engine built in the 19th century to power a flax mill in Ladygrove, Derbyshire, England. History [ edit ]
The direct metal mastering (DMM) process uses a copper-coated rather than lacquer-coated disc. Before lacquer discs, master recordings were cut into blank wax discs. Once complete, this master disc is used to produce matrices from which the record is pressed. For all intents and purposes, the finished record is a facsimile of this master disc. [1]
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.
Professional Disc (PFD) is a digital recording optical disc format introduced by Sony in 2003 primarily for XDCAM, its tapeless camcorder system. It was one of the first optical formats to utilize a blue laser, which allowed for a higher density of data to be stored on optical media compared to infrared laser technology used in the CD and red laser technology used in the DVD format.
A disc cutter (also known as a power cutter or a concrete saw) is a specialised, often hand-held, power tool used for cutting hard materials, ceramic tile, metal, concrete, and stone for example.