Rave music may either refer to the late 1980s/early 1990s genres of house, acid house and techno, the first genres of music to be played at rave parties, or to any other genre of electronic dance music (EDM) that may be played at a rave. The genre "rave", also known as hardcore by early ravers, first appeared amongst the UK "acid" movement during the late 1980s at warehouse parties and other underground venues, as well as on UK pirate radio stations. Rave music is usually presented in a DJ mix set, although live performances are not uncommon.