At a party in New York City, Jamaican musician DJ Kool Herc (pictured) began rapping during an extended break, laying the foundation for hip hop music.

Clive Campbell, better known by his stage name DJ Kool Herc, is a Jamaican-American DJ who is credited with being the founder of hip hop music in the Bronx, New York City, in 1973. Nicknamed the Father of Hip-Hop, Campbell began playing hard funk records of the sort typified by James Brown. Campbell isolated the instrumental portion of the record which emphasized the drum beat—the "break"—and switch from one break to another. Using the same two-turntable set-up of disco DJs, he used two copies of the same record to elongate the break. This breakbeat DJing, using funky drum solos, formed the basis of hip hop music. Campbell's announcements and exhortations to dancers helped lead to the syncopated, rhythmically spoken accompaniment now known as rapping.

Rapping is an artistic form of vocal delivery and emotive expression that incorporates "rhyme, rhythmic speech, and [commonly] street vernacular". It is usually performed over a backing beat or musical accompaniment. The components of rap include "content", "flow", and "delivery". Rap differs from spoken-word poetry in that it is usually performed off-time to musical accompaniment. It also differs from singing, which varies in pitch and does not always include words. Because they do not rely on pitch inflection, some rap artists may play with timbre or other vocal qualities. Rap is a primary ingredient of hip-hop music, and so commonly associated with the genre that it is sometimes called "rap music".

In popular music, a break is an instrumental or percussion section during a song derived from or related to stop-time – being a "break" from the main parts of the song or piece. A break is usually interpolated between sections of a song, to provide a sense of anticipation, signal the start of a new section, or create variety in the arrangement.

Hip-hop or hip hop is a popular music genre that emerged in the early 1970s from the African-American community of New York City. The style is characterized by its synthesis of a wide range of musical techniques. Hip-hop includes rapping often enough that the terms can be used synonymously. However, "hip-hop" more properly denotes an entire subculture. Other key markers of the genre are the disc jockey, turntablism, scratching, beatboxing, and instrumental tracks. Cultural interchange has always been central to the hip-hop genre. It simultaneously borrows from its social environment while commenting on it.