 This created a break with the influence of English-oriented, North American rock groups that originally inspired Brazilian bands.With this new sound, they were able to criticize foreign, mainstream music while simultaneously creating new opportunities for Brazilian rock groups and a more genuinely Brazil-oriented music.This new sound also followed in the tradition of the politically-influenced artists from the 1960s and 1970s, like "Os Mutantes", Gilberto Gil, Caetano Veloso, and Raul Seixas.