On August 11, 1973 Clive “DJ Kool Herc” Campbell was the DJ at his sister Cindy’s back-to-school party in a high-rise apartment at 1520 Sedgwick Avenue in The Bronx. DJ Kool Herc extended the beat of a record by using two record players, isolating the percussion “breaks” by using a mixer to switch between the two records. That party would later become known as the “Birth of Hip Hop.”