He is the founder and director of Gothic Voices, an early music vocal ensemble, which has recorded 25 discs for Hyperion Records, many winning awards. The ensemble has performed in many countries, including, France, Germany, Portugal and Finland. London dates included twice-yearly sell-out concerts at London's Wigmore Hall. The ensemble gave its first Promenade Concert in 1989. The group's work has been chronicled most recently in Daniel Leech-Wilkinson, "The Modern Invention of Medieval Music" (CUP, 2007) and Richard Taruskin, "Text and Act" (OUP, 2006). His work has consistently been praised for its elegant and approachable prose.