A remix is an alternate mix of a song different from the original version, made using the techniques of audio editing. It may incorporate elements of dance music. It is often used to create an upbeat version of a song for playing by disc jockeys in nightclubs. Early pop remixes were fairly simple; in the 1980s, "extended mixes" of songs were released to clubs and commercial outlets on 12-inch vinyl singles. These typically had a duration of 6 to 7 minutes, and often consisted of the original song with 8 or 16 bars of instruments inserted, often after the second chorus; some were as simplistic as two copies of the song stitched end to end. As the cost and availability of new technologies allowed, many of the bands who were involved in their own production (such as Depeche Mode and Duran Duran) experimented with more intricate versions of the extended mix. Madonna began her career writing music for dance clubs and used remixes extensively to propel her career; one of her early boyfriends was noted DJ John Jellybean Benitez, who created several memorable mixes of her work. The Art of Noise took the remix styles to an extreme -- creating new music entirely using samples. After the rise of dance music in the late 1980s, a new form of remix was popularised, where the vocals would be kept and the instruments would be replaced, often with matching backing in the house music or Hi-NRG idiom. The art of the remix gradually evolved, and soon avant-garde artists such as Aphex Twin were creating more experimental remixes of songs, which varied radically from their original sound and yet were not guided by pragmatic considerations such as sales or danceability. In the 1990s, with the rise of powerful home computers with audio capabilities came the mash-up, an unsolicited, unofficial (and often legally dubious) remix created by editing two or more recordings (often of wildly different songs) together. This method is more difficult to work with, because clean copies of separated tracks such as vocals or individual instruments are usually not available to the public. Some artists (such as Björk and Public Enemy) embraced this trend and outspokenly sanctioned fan remixing of their work; there was once a web site which hosted dozens of unofficial remixes of Björk's songs, all made using only various officially-sanctioned mixes. Remix dance remix remix

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