[3] After earning money from building amplifiers and repairing electrical equipment from his mother's house in Waterhouse in the late 1960s, he started his own sound system.

[4] After leaving Jamaica to work in Canada for a few years in the early 1970s, he returned to Kingston in 1976 and set up his own studio at his in-laws' home in Waterhouse,[4] and released a couple of Yabby You productions.

His biggest hit was 1985's "Under Me Sleng Teng" by Wayne Smith, with an entirely digital rhythm hook.

Many credit this song as being the first "digital riddim" in reggae, leading to the modern dancehall era.

Later into 1980s, Jammy improvised Reggae and Dancehall, he digitalized old riddims, like Real Rock, and Far East.