Music is the invisible soul of cinema. It sets the pace of the narrative, amplifying emotions and meanings that images alone cannot convey. In this introductory session, we will explore the fundamental principles of soundtrack composition, from its narrative role to the various aesthetic and creative approaches to film music. The goal is to highlight other possible paths in the field of musical composition for film and audiovisual media, prompting reflection on the creative process and the many forms of dialogue between sound and image.