Engagement with songs through performance and analysis is a key component of music curricula worldwide. Music learning has a significant impact on a number of student competencies, including enhancing students' communicative abilities as they learn to manipulate, express, and share sound in both voice qualities and lyrics. However, common analyses of singing performance rarely focus exclusively on voice quality, and there is no systematic framework which considers how emotional meaning in lyrics interacts with emotional meaning in voice quality. Drawing on systemic functional semiotics, this article proposes a unified theoretical framework for examining how emotional meaning is co-constructed in the voice and lyrics in singing performance. This framework provides a novel approach for discussing and teaching song analysis and performance. The framework will be illustrated through the analysis of the interaction between voice quality and lyrics in the song "Someone Like You" performed by Adele.