What We Started: Bert Marcus and Cyrus Saidi present an informed and absorbing exploration of the history of EDM, boosted by an energetic soundtrack and anchored by the personal stories of legendary DJ Carl Cox and superstar newcomer Martin Garrix. Insights from numerous other DJs and musical talents like Moby, David Guetta, Paul Oakenfold and Usher help tell the often oppositional tales of old school vs. new school and mainstream vs. underground.