Although early Venetian operas by composers such as Claudio Monteverdi and Francesco Cavalli offer today's listeners profound moments of emotion, the complex codes of meaning connecting emotion (or affect) with music in this repertoire are different from those of later seventeenth-century operatic repertoire. The specific textual and musical markers that librettists and composers used to indicate individual emotions in these operas were historically and culturally contingent, and many scholars thus consider them to be inaccessible to listeners today. This dissertation demonstrates a new analytical framework that is designed to identify the specific combinations of elements that communicate each lifelike emotion in this repertoire. Re-establishing the codes that govern the relationship between text, musical sound, and affect in this repertoire illuminates the nuanced emotional language of operas by composers such as Claudio Monteverdi, Francesco Cavalli, Antonio Cesti, and Francesco Lucio. The new analytical framework that underlies this study derives from analysis of seventeenth-century Venetian explanations and depictions of emotional processes, which reveal a basis in their society's underlying Aristotelian philosophy. Chapters III and IV examine extant documents from opera librettists, composers, audience members, and their associates to reveal how they understood emotions to work in the mind and body. These authors, …