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EPs were generally discontinued by the late 1950s in the U.S. as three- and four-speed record players replaced the individual 45 players. One indication of the decline of the 45 rpm EP is that the last Columbia Records reissue of Frank Sinatra songs on 45 rpm EP records, called Frank Sinatra (Columbia B-2641) was issued on 7 December 1959. [64]
The most common diameter sizes for gramophone records are 12-inch, 10-inch, and 7-inch (300 mm, 250 mm, and 180 mm). [1] Early American shellac records were all 7-inch until 1901, when 10-inch records were introduced. 12-inch records joined them in 1903. [2] By 1910, other sizes were retired and nearly all discs were either 10-inch or 12-inch ...
On many kinds of disc recording media, the rotational speed of the medium under the read head is a standard given in rpm. Phonograph (gramophone) records, for example, typically rotate steadily at 16 + 2 ⁄ 3, 33 + 1 ⁄ 3, 45 rpm or 78 rpm (0.28, 0.55, 0.75, or 1.3, respectively, in Hz). Air turbine rotating up to 1 500 000 rpm (25 kHz)
The 45 rpm speed was chosen to allow a 5 + 1 ⁄ 2 playing time from the 7-inch disc. [11] The 7-inch 45 rpm record was released March 31, 1949, by RCA Victor as a smaller, more durable and higher-fidelity replacement for the 78 rpm shellac discs. [12] The first 45 rpm records were monaural, with recordings on both sides of the disc. As stereo ...
The earliest multi-track records, issued around 1919 by Grey Gull Records, were vertically cut 78 rpm discs known as "2-in-1" records. These had finer grooves than usual, like Edison Disc Records . By 1949, when the 45 rpm single and 33 1 ⁄ 3 rpm LP were competing formats, 7-inch 45 rpm singles had a maximum playing time of only about four ...
LP record. The LP (from "long playing" [1] or "long play") is an analog sound storage medium, specifically a phonograph record format characterized by: a speed of 33⁄ 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.
HTV-2 (artist rendering), the fastest uncrewed aerial vehicle. North American X-15, the fastest piloted rocket-powered aircraft. SR-71 Blackbird, the fastest piloted air-breathing aircraft. Rare Bear, the fastest piston-engined aircraft. Musculair 2, the fastest human-powered aircraft.
RIAA equalization is a specification for the recording and playback of phonograph records, established by the Recording Industry Association of America (RIAA). The purposes of the equalization are to permit greater recording times (by decreasing the mean width of each groove), to improve sound quality, and to reduce the groove damage that would ...