Aribo Scholasticus was an eleventh-century music theorist whose treatise De musica was critical in the development of modal theory. By placing emphasis on melodic formulae as well as scales in the definition of mode, Aribo altered the way Western musicians viewed music. The Play of Meanings: Aribo's De Musica and the Hermeneutics of Musical Thought provides a close reading of the treatise and suggests that an investigation...