Music is a powerful phenomenon that constantly surprises us with its potential. This paper will present the results of our research on the effect of musical activities on individuals at risk of social exclusion and on pupils with special educational needs. We will put our findings into the theoretical framework of the El Sistema programme and the Suzuki Method, from which we have drawn. Based on our results, we will discuss the possibilities of music activities for the social field. We will conclude the paper with a call for a more intensive link between the musical and social spheres to accelerate the social justice process.