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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. Disc cutting lathes were also used to produce broadcast transcription discs and for direct-to-disc recording.
After separating from the master, a new mother was polished with a fine abrasive to remove (or at least round-off) the microscopic "horns" at the top of the grooves, produced by the cutting lathe. This allowed the vinyl to flow better in the pressing stage and reduced the non-fill problem.
A technological spin-off from the short-lived TeD video system was Teldec's Direct Metal Mastering technology, called DMM, for the manufacturing of vinyl records: The cutting lathe engraves and impresses the audio signal (via Blumlein stereo cutting) in the copper-plated mother disk, instead of in the lacquer coating on an aluminium 'grandmother' disk.
DMM copper disc sitting on the turntable of a Neumann AM32 lacquer cutting lathe, built in the 1930s. Direct metal mastering (DMM) is an analog audio disc mastering technique jointly developed by two German companies, Telefunken-Decca and Georg Neumann GmbH, toward the end of the 20th century after having seen the same technology used by RCA Princeton Labs for its SelectaVision videodiscs in ...
It was pressed on green vinyl and limited to 300 copies, each wrapped in a 24-page cover. [citation needed] Hardcore punk band 2Minute Minor released a 20-second song called Soda Tax on a single-sided 2" lathe cut record, limited to 50 copies.
Lacquer-coated discs are used for the production of records. Unlike ordinary vinyl records, which are quickly formed from lumps of plastic by a mass-production molding process, a lacquer master or acetate (instantaneous record) is created by using a recording lathe to cut an audio-signal-modulated groove into its surface – a sequential ...