Digital technologies for recording music and distributing it on physical media such as CDs initiated changes in the professional dynamics of musicians since the last two decades of the last century. With the turn of the millennium, digital technologies for online interaction and communication were added to them, especially promoted by the arrival and popularization of the internet. Together, digital recording technologies and digital online interaction and communication technologies have been imposing new meanings on a whole order of relationships canonized for years, which modifies the roles of practically all actors/actresses in this field. In this study, I researched the consequences of these digital and online technologies on the professional practices of musicians, in the light of communication theories, especially in a more pragmatic look for which I sought references in theorists of Media Ecology. I also researched the Brazilian academic production in the field of communication about ICTs and music, from the first 20 years of this century. I went to the field and interviewed in depth 22 music professionals, of different ages, musical genres and mainly stages of use of these new technologies, trying to understand what is significant and recurrent in their contemporary professional practices in this new world of music. In 40 years a lot has changed, from an industry that lost hegemonies maintained around the sale of music on physical media, to musicians who began to compose, produce, distribute and promote their songs from inside their rooms, in their modern and affordable home studios, mediating their processes autonomously for all corners of the world. There is a new musician on the scene. Digital, online, multidisciplinary, connected to economies of scale, unraveling the paradigms of the old industry, delighted and motivated by a supposed new democracy.