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The following is an attempt to list some of the most valuable records. Data is sourced from Record Collector , eBay , Popsike, the Jerry Osborne Record Price Guides, and other sources. Wu-Tang Clan 's Once Upon a Time in Shaolin CD (of which only one copy was produced) was sold through Paddle8 on November 24, 2015, for $2,000,000, according to ...
As Newsweek reported, record sales grew in 2014 by more than 50 percent to hit more than a million, the highest since 1996 -- and sales are continuing to increase. Record owners are also ...
The most common rotational speeds for gramophone records are 33 + 1 ⁄ 3 revolutions per minute (rpm), 45 rpm, and 78 rpm. Established as the only common rotational speed prior to the 1940s, the 78 became increasingly less common throughout the 1950s and into more modern decades as the 33 and the 45 became established as the new standards for ...
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.
The introduction of both the 33 1 ⁄ 3 rpm, 12-inch LP record and the 45rpm, 7-inch record, coming into the market in 1948/1949, provided advances in both storage and quality. These records featured vinyl (polyvinyl chloride or polystyrene), replacing the previous shellac materials.
Grooves on a modern 33 rpm record Uncommon Columbia 7-inch vinyl 33 + 1 ⁄ 3 rpm microgroove ZLP from 1948. CBS Laboratories had long been at work for Columbia Records to develop a phonograph record that would hold at least 20 minutes per side. [55] [56] Research began in 1939, was suspended during World War II, and then resumed in 1945. [57]
However, some very early (c. 1928–1931) radio programs were on sets of 12-inch or even 10-inch (25 cm) 78 rpm discs, and some later (circa 1960–1990) syndicated radio programs were distributed on 12-inch 33 + 1 ⁄ 3 rpm microgroove vinyl discs visually indistinguishable from ordinary records except by their label information.
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