Online music distribution has been changing since Napster first appeared in 1999, and it certainly caused several impacts on musical production, distribution, consumption and sharing dynamics, particularly among those subcultures that are notoriously active at the margins of the music industry. This paper aims to discuss how the emergence of Napster opened a way for producing, sharing and consuming music that has benefited DIY youth cultures in Brazil, with a special focus on the straight edge community in the city of São Paulo. This article is based on ethnographic fieldwork carried out between 2011 and 2013, which had online music as a permeating analytical subject. Even after three decades of existence, straight edge still has significan...