Cantus firmus settings from the late Middle Ages and Renaissance: (a) Kyrie Cunctipotens from Faenza Codex (ca. 1400); (b) Guglielmo Ebreo da Pesaro, Spagna (Falla con misuras, ca. 1470); (c) John Bull, Hexachord Fantasia (BuK 18, ca. 1600)