The world is watching Brazil after the country won its first Oscar for “I’m Still Here”, a film set in Rio de Janeiro during the dictatorship in the 1970s. The film’s smooth soundtrack feeds into foreigners’ imagination of Brazil as a country where samba and bossa nova bands croon jazzy songs on sandy boardwalks. But this image is out of date. Modern Brazilians prefer sertanejo, a bouncing country genre, and funk, a style that emerged from Rio’s favelas. Funk in particular could go global, and change Brazil’s brand in the process.