Evolution of the rhythmic speech of Rap
The evolution of the rhythmic speech really of hip hop, of rapping again we have to understand that when Africans went to America and to the Caribbean and to Brazil South America, it was like in Jamaica for example, I will give you the Jamaican example. You have 20 different African linguistic groups in Jamaica. All of whom have different words but different rhythmic tonality. So, what you think of as the Jamaican Patwa accent is not just Jamaicans failing to speak English properly, its Africanised English.