The ubiquitous availability of music information allows for a blending of styles that cuts across all genres and cultural spheres. Although this kind of musical hybridization is not a new phenomenon, its scope is increasing in an unprecedented way with the emergence of knowledge-based digital technologies. This widespread and globalized exchange involves the knowledge of music as well as music itself. The transfer of knowledge is spurred on by multimedia and, simultaneously, by the formalization of music theory included in music ontologies and conveyed by the digital paradigm based on knowledge and metadata. This paradigm has a significant impact on how people gain access to music and provides a profound renewal of the ways that music is made.This article explores the hybridization of music in terms of both communicational exchange and its technical infrastructure.