This work seeks to demonstrate some pertinent connections between the contemporary ethnomusicology and the multiple lines of sociological research on urban Afro populations, from the partial investigation of the project Forms of Sociocultural Production of the African Youth Population in the Cali, City: The case of Caleño Rap in the Decade of the Nineties. For this purpose set out the main investigative reflections on the implications both social (Urrea and Quintín, 2000; Pratt, 2000a) as cultural of this phenomenon in the city (Waxer, 1997; Cuenca, 2001, 2008; Vélez, 2009) in addition, local rap music corpus, sociological studies of local violence towards African youths and the segregation lived in a Latin-American city about the ethnic population of musical rappers in Cali, Colombia at the end of the millennium.