House music, or simply house, is a genre of electronic dance music characterized by a repetitive four-on-the-floor beat and a typical tempo of 115–130 beats per minute. It was created by DJs and music producers from Chicago's underground club culture and evolved slowly in the early/mid 1980s as DJs began altering disco songs to give them a more mechanical beat. By early 1988, house became mainstream and supplanted the typical '80s music beat.
House was created and pioneered by DJs and producers in Chicago such as Frankie Knuckles, Ron Hardy, Jesse Saunders, Chip E., Joe Smooth, Steve "Silk" Hurley, Farley "Jackmaster" Funk, Marshall Jefferson, Phuture, and others. House music initially expanded to New York City, then internationally to cities such as London, and ultimately became a worldwide phenomenon.