In this talk I will introduce our Multilayer Network Model for musical pieces. The goal of this model is to describe the dynamics and interactions occurring during the generative process of music: how each voice or instrument creates a new melody while interacting with other voices. In such a way, we establish a link between the properties of these networks and the music that is encoded in such networks. Then, I will present some of the applications of this model such as the generation of music via synchronized random walks.