John Potter sings with The Dowland Project, Red Byrd and the Gavin Bryars Ensemble and is Reader in Music at the University of York. He is the author of Vocal Authority (published by Cambridge University Press) and most recently Tenor: History of a Voice (Yale University Press). His current performance project is Being Dufay, a realisation of 15th century Dufay fragments by Ambrose Field. This is available on CD (ECM New Series 2071) and as a live event with Ambrose Field (live electronics) and a video by Mick Lynch.