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Presto 8N Disc Cutting Lathe (1950) used by the Canadian Broadcasting Corporation to record radio programs. A disc cutting lathe is a device used to transfer an audio signal to the modulated spiral groove of a blank master disc for the production of phonograph records.
Presto 8N Acetate Engraver - 1950 The CBC recorded radio programs on 16-inch acetate transcription discs. Made of glass, metal or even paper with a thin layer of acetate fixed to the surface, these discs were used until 1966.
Presto 8N Acetate disc engraver (1950) used by the Canadian Broadcasting Corporation to record radio programs. Before the introduction of magnetic tape for mastering, disc recording was done "live" (see direct to disc recording), although sometimes intermediate disc-to-disc editing procedures were involved. [2]
The grooves are engraved into the master disc on a mastering lathe.Early versions of these master discs were soft wax, and later a harder lacquer was used.. The mastering process was originally something of an art as the operator had to manually allow for the changes in sound which affected how wide the space for the groove needed to be on each rotation.
Scully 280 eight-track recorder at the Stax Museum of American Soul Music. In 1961, recognizing the limited market for professional disc cutting lathes and facing increased competition from Neumann, whose disc cutting lathes were no longer restricted from being imported to the United States, [5] Scully Recording Instruments entered the tape recorder market.
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.