its used mostly used in pagode which is the bastard child of samba. there are different kinds of sambe...the stuff you get at carnival in Rio and São Paolo, there is the ballad type stuff that is really beautiful and jazzy and then there is Pagode which is a kind of Pop/dance music that normally have songs that full of sexual inuendo and all sound the damn same. Unfortunately they have been doing this to Forró as well and the popular forró is a homogenised bunch of crap...thankfully the real stuff is being kept alive and played out in the small towns and villages. There is also another music..indigineous to the north east called Maracatu that is considered the only music really brazilian (not based on african or european rythms[sic]). If you live in the UK look for a scots group called Bloco Vomit they do a high speed version of Maracatu and rock music.