Phonograph record
A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is a disc-shaped analog sound storage medium with an inscribed, modulated spiral groove.[not verified in body] The groove usually starts near the outside edge and ends near the center of the disc. The stored sound information is made audible by playing the record on a phonograph (or "gramophone", "turntable", or "record player").
Records have been produced in different formats with playing times ranging from a few minutes to around 30 minutes per side. For about half a century, the discs were commonly made from shellac and these records typically ran at a rotational speed of 78 rpm, giving it the nickname "78s" ("seventy-eights"). "Vinyl" records made from polyvinyl chloride (PVC) were introduced in 1948, and by 1958 they became standard, replacing the old 78s and remain so to this day; they have since been produced in various sizes and speeds, most commonly 7 in (180 mm) discs played at 45 rpm (typically for singles, also called 45s ("forty-fives")), and 12 in (300 mm) discs played at 33+1⁄3 rpm (known as LP's, "long-playing records", typically for full-length albums) – the latter is the most prevalent format today.
Overview
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The phonograph record was the primary medium used for music reproduction throughout the 20th century. It had co-existed with the phonograph cylinder from the late 1880s and had effectively superseded it by around 1912. Records retained the largest market share even when new formats such as the compact cassette were mass-marketed. By the 1980s, digital media, in the form of the compact disc (CD), had gained a larger market share, and the record left the mainstream in 1991.[1] Since the 1990s, records continue to be manufactured and sold on a smaller scale, and during the 1990s and early 2000s were commonly used by disc jockeys (DJs), especially in dance music genres. They were also listened to by a growing number of audiophiles. The phonograph record has made a niche resurgence in the early 21st century,[2][3] growing increasingly popular throughout the 2010s and 2020s.[4]
Phonograph records are generally described as a single or LP for long playing or their diameter in 12 in (300 mm), 10 in (250 mm), 7 in (180 mm)), the rotational speed in revolutions per minute (rpm) at which they are played (8+1⁄3, 16+2⁄3, 33+1⁄3, 45, 78),[5] and their time capacity, determined by their diameter and speed (LP [long play], 12 in (300 mm) disc, 33+1⁄3 rpm; EP [extended play], 12 in (300 mm) disc or 7 in (180 mm) disc, 33+1⁄3 or 45 rpm; Single, 7 in (180 mm) or 10 in (250 mm) disc, 45 or 78 rpm); their reproductive quality, or level of fidelity (high-fidelity, orthophonic, full-range, etc.); and the number of audio channels (mono, stereo, quad, etc.).[citation needed]
Naming
[edit]The various names have included phonograph record (American English), gramophone record (British English), record, vinyl, LP (originally a trademark of Columbia Records), black disc,[6] album, and more informally platter,[7] wax,[8] or liquorice pizza.[9]
Early development
[edit]Manufacture of disc records began in the late 19th century, at first competing with earlier cylinder records. Price, ease of use and storage made the disc record dominant by the 1910s. The standard format of disc records became known to later generations as "78s" after their playback speed in revolutions per minute, although that speed only became standardized in the late 1920s. In the late 1940s, new formats pressed in vinyl, the 45-rpm single and 33-rpm long playing LP, were introduced, gradually overtaking the formerly standard "78s" over the next decade. The late 1950s saw the introduction of stereophonic sound on commercial discs.
Predecessors
[edit]The phonautograph was invented by 1857 by Frenchman Édouard-Léon Scott de Martinville.[10] It could not, however, play back recorded sound,[11] as he intended for people to read back the tracings,[12] which he called phonautograms.[13] Prior to this, tuning forks had been used in this way to create direct tracings of the vibrations of sound-producing objects, as by English physicist Thomas Young in 1807.[14]
In 1877, Thomas Edison invented the first phonograph,[15] which etched sound recordings onto phonograph cylinders. Unlike the phonautograph, Edison's phonograph could both record and reproduce sound, via two separate needles, one for each function.[16]