Kerry Boyle is a choral director specialising in upper voice choirs, and she works as a lecturer, associate researcher, and vocal tutor at Canterbury Christ Church University, UK.Aoife Hiney is a choral conductor and singer. She is a lecturer at the Escola Superior de Educação, Porto, Portugal, and a member of the CIPEM/INET-md research centre.Lynn Revell was a Professor and Director of Research in the Faculty of Arts, Humanities, and Education at Canterbury Christ Church University, UK.