This master’s project explores the role of the répétiteur in vocal coaching, focusing on how different forms of communication - verbal, non-verbal, musical, and gestural - affect the rehearsal process and artistic outcomes. Through video-recorded sessions with individual singers and ensembles, as well as reflective journaling and analysis, the author investigates how preparation, personal interaction, and communication strategies contribute to trust, collaboration, and musical expression. Drawing on theories from Constantine, Montgomery, and Nafisi, the project highlights the répétiteur’s dual role as musical partner and facilitator, emphasizing the importance of presence, adaptability, and a supportive learning environment. The findings suggest that communication in coaching is not merely instructional but relational, enabling both artistic risk-taking and meaningful musical development.