From Kingston to the Bronx

DJ Kool Herc grew up around Jamaican sound systems and brought their ideas — big speakers, working the crowd, extending the break — to Bronx block parties, helping seed hip-hop.

Clive Campbell was born in Kingston in 1955 and grew up around Jamaican sound-system dances before his family emigrated to the Bronx in 1967, when he was thirteen. As DJ Kool Herc, he brought sound-system instincts - oversized speakers, working a crowd, playing to the dancers rather than just the record - to New York block parties. His key technical innovation, first used around 1973, was isolating a record's instrumental "break" and looping it between two copies of the same record on twin turntables, a technique he called the Merry-Go-Round; it let him stretch a few seconds of drum break into a continuous groove for dancers. That innovation is why his sister Cindy's back-to-school party at 1520 Sedgwick Avenue on August 11, 1973 is now widely marked as hip-hop's birth date - a Jamaican sound-system idea, replanted in the Bronx.

DJ Kool Herc biography and the August 11, 1973 party: Wikipedia; History.com. The "birth date of hip-hop" framing is a widely used historical shorthand rather than a literal single-moment invention - hip-hop's early development involved many contributors (Afrika Bambaataa, Grandmaster Flash) building on Herc's technique.