In the sociology of music, although music is the first cultural practice of young people, the ways of appropriation are often mentioned but are barely known. The aim of the research, summarized by the present synthesis, is to enlighten the mechanisms structuring social and cultural practices, and so individual evolutions, in the field of actual music. It aims to get a thinner comprehension of the conditions of diversified cultural practices' transmission-appropriation process, between generations and for different social classes, on territories having a highly concentrated working-class habitat. Most often cultural practices are studied from a diffusion angle. It is less often questioned on the "reception" angle. It's even less often questioned on the reception being linked to the "appropriation" mechanism experienced during childhood and adolescence angle. From what we know, no musical socialization study, meaning the habits build around the family members, parents, grandparents, and all the other possible cultural prescribers, has been realized in the French Literature. That's the purpose of the present research to renew the approach of cultural practices' differences or inequalities considering the social origin, to work on the perception of what is called the "Cultural transmission crisis" between different generations and to give comprehension keys of the urbanized working-class youth's cultural breach and so to enlighten from a new angle the often questioned and/or discriminated parental education. Our data collect has been linked to the musical action program "Zebrock au bahut", led by our partner organization within the PICRI project. They are of two main types: observation of some cultural actions led by specialized guests or partner teachers and semi-directed interviews with some of the young people observed, and for 9 of them with their parents too. The main part of the survey took place in Seine-Saint-Denis (Paris' north suburb, known as being the most popular suburb): 24 students were interviewed, all of them being in secondary school (14 years old). Half of these 24 are enrolled in schools with a very homogenous working-class population. On the opposite, the other half is enrolled in schools having a heterogeneous population, from downtown or not, but having the salaried intellectual categories represented. Five more interviews have been done with students from an economically favored Parisian school. So we could investigate with students from the popular suburbs, in comparison with their more privileged counterparts of the same territory and from Paris. The socialization has been studied from different angles: the diversity of the music prescribers to whom the young is related, the material conditions and habits given by the parental home, the music identity dimension, the music perception level, the categorizations and descriptions done by the interviewed young people of their knowledge in music fields and of with their musical tastes.