Among the most memorable innovations of music and poetry in thirteenth-century France was a genre that seemed to privilege sound over sense. The polytextual motet is especially well-known to scholars of the Middle Ages for its tendency to conceal complex allegorical meaning in a texture that, in performance, made words less, rather than more, audible. It is with such musical sound that this book is concerned. What did it mean to create a musical effect so potentially independent from the meaning of words? Is it possible such supermusical effects themselves had significance? The Sense...