![]() ![]() For about half a century, the discs were commonly made from shellac, with earlier records having a fine abrasive filler mixed in. The groove usually starts near the periphery and ends near the center of the disc. ![]() The following images, as well as a few other interesting artifacts, are currently on display on the third floor of the Library for the Performing Arts at Lincoln Center.Problems playing this file? See media help.Ī phonograph record (also known as a gramophone record, especially in British English), a vinyl record (for later varieties only), or simply a record or vinyl is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. But even then the manufacturing process was far from complete, as these photographs will show. From that disc a few so-called mother discs would be created, providing the molds for a large number of “stampers” that would be used to actually press the grooves into blank, pre-cut rounds of shellac. That would become the master disc, also known as the matrix. Then thicker layers of nickel and copper were added to the disc in electroplating baths, and when the desired strength was achieved, the lacquer disc was carefully stripped away from the metal and the gold surface would be plated with nickel. The lacquer or acetate disc was then placed in the aptly named gold sputtering machine, an electroplating apparatus that would coat the lacquer with a very fine layer of gold, creating a negative, convex impression of the record’s grooves. Magnetic tape had yet to become the recording norm instead, music was directly translated to the grooves of a lacquer or acetate record by a special needle that actually cut the grooves as the performance happened, hence the musical slang term for recording: "cutting sides." Technology in the recording studio was on the cusp of changing as well. Both materials have their pro and cons: vinyl records are flexible and capable of higher fidelity but the surface is easily marred by scratches or even direct sunlight, while records made from shellac are less prone to scratches but are comparatively heavy and brittle. That early version of the LP was still commonly used for commercial purposes, especially as a means of recording radio programs for later broadcast.īoth the LP and the 45 were made of vinyl, unlike the 78s that we see here, which were made from shellac. In 1949, RCA Victor introduced the 7 inch 45 RPM single, and the format war was on.Ĭuriously, RCA Victor had already created a different version of the 33 1/3 RPM LP in 1930, but it failed to catch on with the public, in part because the Depression had inhibited consumer interest in new technologies. Unlike the typical one song per side limitation of 78s, a number of popular songs or a full movement of a classical piece could now be heard in one sitting, without interruption. In two years - and in this very plant - Columbia would begin producing the first commercially viable Long-Playing, 33 1/3 RPM, 12 inch records (LPs). Today collectors refer to them by their speed - "78s" - but back then they were simply called records.ġ946 was approaching the end of one era of record production and the beginning of another. The records we see being made, inspected, and shipped in these images are 10 inch discs that would have been played at a speed of 78 RPM. They provide a fascinating look at how music was reproduced in those days. The photographs that you see here were taken on a tour of the Bridgeport, CT Columbia Records factory in 1946. ![]()
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