This work was developed within the methodological guidelines of a qualitative case study, having as its object the Gabriel Prestes Fanfare - FAGAP - from the city of Lorena, located in the Vale do Paraíba Paulista region. The onset of the research involved getting to know how the fanfare space interferes with its participants by means of a long, effective immersion in the fieldwork. The adopted research plan was developed in such a way as to simultaneously follow two analytical axes on the object of the thesis: a diachronical one and a synchronical one. The diachronical axis enabled studying the group within an historical frame of reference of fanfares as well as FAGAP itself, while the synchronical axis dealt with current circumstances. Crossing these two axes made it possible to delineate a configuration of FAGAP and to analyze the characteristics it shares with other musical groups, as well as to focus on its peculiarities. Adopting such a methodological design proved possible to do away with an investigative perspective focused solely on the present situation of the group being studied, as well as to recover practices, contexts and traditions which help approach the group in its everyday life. The data collected in the historical research and those collected in the fieldwork produced a dense body of knowledge which was critically analyzed in the light of authors who study representations and cultures, particularly Jean Claude Abric, Iuri Lotman and Bruno Latour. By confronting the history of fanfares to that of FAGAP itself, the data show how fanfares have survived cultural changes and resisted the threat of extinction, becoming an educational space for youths.