On August 11, 1973, DJ Kool Herc played at a back-to-school party in a community room at 1520 Sedgwick Avenue in the Bronx. His sister Cindy Campbell had organized it. The party is remembered as the beginning of hip-hop.
Expensive DJ equipment “was still a limiting factor” for young DJs. Herc “figured out how to use his two turntables to loop a single break with two copies of the same record.”