In radio broadcasting, airplay is how frequently a song is being played on radio stations. A song which is being played several times every day (spins) would have a large amount of airplay. Music which became very popular on jukeboxes, in nightclubs and at discotheques between the 1940s and 1960s would also have airplay.
For commercial broadcasting, airplay is usually the result of being placed into rotation, also called adding it to the station's playlist by the music director, possibly as the result of a Pay for Play sponsored by the record label. For student radio and other community radio or indie radio stations, it is often the selection by each disc jockey, usually at the suggestion of a music director.
Most countries have at least one radio airplay chart in existence, although larger countries such as Canada, the United States of America, the United Kingdom, Germany, Australia,Japan, and Brazil have several, to cover different genres and areas of the country.
A song which was successful in the airplay charts but weak in sales was commonly known as a "turntable hit" when radio stations played only vinyl singles. Airplay can be a crucial element in securing a singer's 'hit', and alongside social networking websites it is an effective method that artists use to make their name known.
Airplay was a short-lived American band, formed by David Foster and Jay Graydon. The band released a self-titled album in 1980, containing "Nothin' You Can Do About It" (later recorded by Manhattan Transfer) and a cover of the Earth, Wind & Fire hit "After the Love Has Gone", written by Foster and Graydon with Bill Champlin.
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AirPlay is a proprietary protocol stack/suite developed by Apple Inc. that allows wireless streaming between devices of audio, video, device screens, and photos, together with related metadata. Originally implemented only in Apple's software and devices, it was called AirTunes and used for audio only. Apple has since licensed the AirPlay protocol stack as a third-party software component technology to manufacturer partners for them to use in their products in order to be compatible with Apple's devices.
There are two types of AirPlay devices, those that send audiovisual content, and those capable of receiving the content and rendering it on displays and speakers.
AirPlay sender devices include computers running iTunes, and iOS devices such as iPhones, iPods, and iPads running iOS 4.2 or greater. OS X Mountain Lion supports display mirroring via AirPlay on systems containing 2nd generation Intel Core processors or later. There are third party streamers such as AirParrot, AirMyPC, AirFlick, AirFoil and TuneBlade.