At 1520 Sedgwick Avenue in the Bronx, Clive 'DJ Kool Herc' Campbell spun records for his sister Cindy's back-to-school party, isolating and looping the instrumental percussion 'breaks' of funk records to give dancers extended rhythm to move to. This technique, along with his friend's early MCing over the beats, is credited as the foundational moment of hip-hop culture, which grew from Bronx house parties into a global musical and cultural movement.
Cindy Campbell wanted to raise money for new school clothes, so she rented the recreation room in her apartment building at 1520 Sedgwick Avenue in the West Bronx and asked her older brother Clive to DJ. Clive Campbell, who performed under the name DJ Kool Herc, had been experimenting with a technique he'd noticed at parties: dancers went wildest during the brief instrumental percussion breaks of funk and soul records, then lost energy once the vocals returned.
Using two identical copies of the same record on two turntables, Herc figured out how to loop that break indefinitely, switching between the two copies to extend the rhythmic breakdown for as long as he wanted — a technique he called the 'Merry-Go-Round.' Partygoers packed into the rec room that August night, and the technique caught on fast across Bronx house parties and parks.
Within a few years, Herc's innovation combined with the rhyming of early MCs, breakdancing crews, and graffiti art to form the four pillars of hip-hop culture. The unassuming rec room at 1520 Sedgwick Avenue is now recognized by historians, and even by a New York City Council resolution, as the literal birthplace of a genre that would reshape global popular music within a generation.