Philip Glass's minimalist opera The Voyage commemorates the 500th Anniversary of Christopher Columbus's discovery of America. In the opera, Philip Glass, like other composers, expresses singers' and non-singers' words and activities by means of melodies, rhythms, chords, textures, timbres, and dynamics. In addition to these traditional musical expressions, successions of reiterating materials (RMs, two or more iterations of materials) and non reiterating materials (NRMs) become new musical expressions. However, dividing materials into theses two categories only distinguishes NRMs from RMs without exploring relations among them in successions. For instance, a listener cannot perceive the functional relations between a partial iteration of the RM and the NRM following the partial RM because both the partial RM and the NRM are NRMs. As a result, a listener hears a succession of NRM followed by another NRM. When an analyst relabels the partial RM as partial loop, and the NRM following the partial RM as loop breaker, a listener hears the NRM as a loop breaker causing a partial loop. The musical functions of loops and loop breakers concern a listener's expectations of the creation, sustaining, departure, and return to the norm in successions of loops and loop breakers. When a listener associates …

The Composers' Collective, founded by leftist composers in 1932 New York City, sought to create proletarian music that avoided the "bourgeois" traditions of the past and functioned as a vehicle to engage Americans in political dialogue. The Collective aimed to understand how the modern composer became isolated from his public, and discussions on the relationship between music and society pervade the radical writings of Marc Blitzstein, Charles Seeger, and Elie Siegmeister, three of the organization's most vocal members. This new proletarian music juxtaposed revolutionary text with avant-garde musical idioms that were incorporated in increasingly greater quantities; thus, composers progressively acclimated the listener to the dissonance of modern music, a distinctive sound that the Collective hoped would become associated with revolutionary ideals. The mass songs of the two Workers' Song Books published by the Collective, illustrate the transitional phase of the musical implementation of their ideology. In contrast, a case study of the song "Chinaman! Laundryman!" by Ruth Crawford Seeger, a fringe member of the Collective, suggests that this song belongs within the final stage of proletarian music, where the text and highly modernist music seamlessly interact to create what Charles Seeger called an "art-product of the highest type."

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, …