Dub music had arisen in Jamaica due to the influence of American sailors and radio stations playing R&B. Large sound systems were set up to accommodate poor Jamaicans, who couldn't afford to buy records, and dub developed at the sound systems (refers to both the system and the parties that evolved around them). Herc was one of the most popular DJs in early 70s New York, and he quickly switched from using reggae records to funk, soul, rock and, later, disco, since the New York audience did not particularly like reggae. Because the percussive breaks were generally short, Herc and other DJs began extending them using an audio mixer and two records.
Turntablist techniques, such as beat mixing/matching, scratching (seemingly invented by Grand Wizard Theodore) and beat juggling eventually developed along with the breaks, creating a base that could be rapped over. This same techniques contributed to the popularization of remixes. Such looping, sampling and remixing of another's music, sometimes without the original artist's knowledge or consent, can be seen as an evolution of Jamaican dub music,[8][9] and would become a hallmark of the hip hop style.
Jamaican immigrants also provided another influence on the vocal style of rapping, as many Jamaican immigrants, for example Herc, started delivering simple raps at their parties, inspired by the Jamaican tradition of toasting.[8][10]
DJs and "MCs" would often add call and response chants, often comprising of a basic chorus, to allow the performer to gather his thoughts (such as "one, two, three, y'all, to the beat, y'all").