The Detroit Electronic Music Festival (DEMF) is an electronic dance music showcase held in Detroit each Memorial Day weekend since 2000. In subsequent years, the similarly themed festivals Movement (2003–2004), Fuse-In (2005) and currently, Movement: Detroit's Electronic Music Festival (2006-2007) continued the DEMF's traditions, with each name change reflecting shifts in festival management. All of these festivals featured performances by musicians and DJs, and emphasized the progressive qualities of the culture surrounding electronic music.

The first Detroit Electronic Music Festival was held in 2000, established by Carol Marvin and her company Pop Culture Media. Marvin had previously been a sponsorship organizer for the Ford Detroit International Jazz Festival and Detroit-Montreux Jazz Festival, and was a producer of the 1993 Michigan State Fair.

The DEMF was intended to give Detroit and its overlooked history of electronic music major exposure both locally and nationally. Carl Craig, hired by Carol Marvin to act as "Artistic Director", booked a diverse range of the talent, from big internationally recognized names to lesser-known local talent. Patterned on high-profile dance music festivals in Europe, the DEMF had free admission and attracted many international attendees.

Each festival has been held at Hart Plaza in downtown Detroit, and has been sanctioned and financially supported by the City of Detroit. The city's support for the festival has been seen by many as the first high-profile acknowledgement and celebration of the city as the birthplace of techno music.

Source : http://en.wikipedia.org