An attendee during the TomorrowWorld Electronic Music Festival on September 29, 2013 in Chattahoochee Hills, Georgia. Christopher Polk/Getty Images hide caption

DJ Koze. Courtesy of the artist hide caption

Holger Czukay of Can, who died Sept. 5 in Weilerswist, Germany. Ullstein Bild/Getty Images hide caption

Hüsker Dü. From left: Greg Norton, Grant Hart and Bob Mould. Steve Hengstler/Courtesy of Numero Group hide caption

The Who in 1969, the year the group released the rock opera Tommy. Earlier in the 1960s, the band says it only cared about singles. By 1971, it was making albums that would help define the "heritage rock" industry. Steve Wood/Getty Images hide caption

Van Morrison live at the Santa Monica Civic Auditorium on May 19, 1973 in Santa Monica, Calif. Ed Caraeff/Getty Images hide caption

Armand Van Helden and Disclosure's Guy Lawrence at Holy Ship!, January 2015. Erik Voake/courtesy of the artists/Holy Ship! hide caption

Christine Tran (left), Frankie Decaiza Hutchinson (center) and Emma Burgess-Olson run the all-female DJ booking agency Discwoman. Aurora Halal/Courtesy of Discwoman hide caption

The cast of WKRP in Cincinnati, recently reissued on DVD by Shout! Factory, which collected licenses to include most of the original music broadcast on the show. Courtesy Sony Pictures Television hide caption