The Clerks' Group is a popular a cappella singing ensemble devoted largely to Medieval and Renaissance-era vocal works. It consists of eight singers, but early on performed with as few as six. The range of most of the compositions the group performs spans from the eleventh century to the end of sixteenth century, though there are a small number of contemporary pieces that were commissioned for concert use. At the heart of the repertory are sacred works by Ockeghem, Josquin Desprez, Obrecht, Machaut, Dufay, Dunstable, and other composers of that era. Of these the ensemble has c...