LP record

Capital letters LP in a circle
A 12-inch LP vinyl record
Media typeAudio playback
EncodingAnalog groove modulation
CapacityOriginally 23 minutes per side, later increased by several minutes, much longer possible with very low signal level
Read mechanismMicrogroove stylus (maximum tip radius 0.001 in or 25 μm)
Dimensions12 in (30 cm), 10 in (25 cm)
UsageAudio storage
Extended from1948
Extended toPresent

The LP (from "long playing"[1] or "long play") is an analog sound storage medium, a vinyl record format characterized by a speed of ​33 13 rpm, a 12- or 10-inch (30- or 25-cm) diameter, and use of the "microgroove" groove specification. Introduced by Columbia in 1948, it was soon adopted as a new standard by the entire record industry. Apart from a few relatively minor refinements and the important later addition of stereophonic sound, it has remained the standard format for vinyl albums.

Format advantages

At the time the LP was introduced, nearly all phonograph records for home use were made of an abrasive (and therefore noisy) shellac compound, employed a much larger groove, and played at approximately 78 revolutions per minute (rpm), limiting the playing time of a 12-inch diameter record to less than five minutes per side. The new product was a 12- or 10-inch (30 or 25 cm) fine-grooved disc made of PVC ("vinyl") and played with a smaller-tipped "microgroove" stylus at a speed of ​33 13 rpm. Each side of a 12-inch LP could play for more than 20 minutes. Only the microgroove standard was new, as both vinyl and the ​33 13 rpm speed had been used for special purposes for many years, as well as in one unsuccessful earlier attempt to introduce a long-playing record for home use by RCA Victor.

Although the LP was suited to classical music because of its extended continuous playing time, it also allowed a collection of ten or more pop music recordings to be put on a single disc. Previously, such collections, as well as longer classical music broken up into several parts, had been sold as sets of 78 rpm records in a specially imprinted "record album" consisting of individual record sleeves bound together in book form. The use of the word "album" persisted for the one-disc LP equivalent.

Other Languages
български: LP
català: LP
eesti: LP
español: LP
euskara: LP
français: Long play
galego: Long Play
한국어: 장시간 음반
hrvatski: Long Play
Bahasa Indonesia: Rekaman LP
íslenska: Breiðskífa
italiano: Long playing
עברית: אריך-נגן
latviešu: LP ieraksts
Nāhuatl: LP
Nederlands: Langspeelplaat
norsk: LP
română: Long play
русский: LP
sicilianu: Long-playing
Simple English: LP record
srpskohrvatski / српскохрватски: Long play
svenska: LP
Türkçe: Uzunçalar
українська: LP
Winaray: LP rekord
中文: 密紋唱片