Understanding expressive ensemble singing through acoustics
A valuable body of research utilizes the study of acoustics to explore the combined sonic output of vocal ensembles and the processes and vocal contributions of individual voices within an ensemble. This chapter focuses on specific acoustic features that can be measured in the acoustic signal and contribute to expressive ensemble performance, including: intonation, vibrato, intensity, and timbre. The different methodological approaches to acoustics research for singing ensemble performance are discussed, alongside their context and relevance in understanding the importance of these features from a more holistic perspective. In light of the development of digital technologies, new approaches arise that address the complexities of analyzing multiple voices, spanning from synthesis-based studies to more ecological experiments. The implications for this corpus of research to influence practice and decision-making in performance are highlighted alongside the opportunities for more performers to lead research in this area, facilitated through increasingly accessible technology.