This dissertation explores the analysis and creation of compositions from the standpoint of texture and momentum. It is comprised of four chapters. The first presents a number of concepts as tools for analysis, including textural typography and transformation, perception of time and psychological engagement of an audience, and respiration as a metaphor for musical momentum. The second and third chapters apply these tools to Gerard Grisey's "Periodes" and "Partiels," and Brian Ferneyhough's "Lemma-Icon-Epigram." The fourth explores specific methodologies used in composing my dissertation piece, "Phase," including the application of number systems ranging from formal to local levels.

Among the Voices Voiceless is a composition for flute (doubling piccolo), clarinet (doubling bass clarinet), viola, cello, percussion, piano, and electronics, based on the poem "What would I do without this world faceless incurious" by Samuel Beckett. The piece is a setting for disembodied voice: the vocal part exists solely in the electronics. Having no physical body, the voice is obscured as the point of empathy for the audience. In addition, instrumental solos compete for focus during the work's twenty minute duration. In passages including a soloist, the soloist functions simultaneously as antagonist and avatar to the disembodied voice. Spoken word recordings and electronic manipulation of instrumental material provides further layers of ambiguity. The companion critical essay "Among the Voices Voiceless": Setting the Words of Samuel Beckett proposes the distillation of Beckett's style into the elements of prosaicness, repetition, fragmentation, ambiguity, and symmetry. Discussions of Beckett's works such as Waiting for Godot and Molloy demonstrate these elements in his practice. This framework informs the examination of two other musical settings of Beckett's poetry: Neither by Morton Feldman and Odyssey by Roger Reynolds. Finally, these elements are used to analyze and elucidate the compositional decisions made in Among the Voices Voiceless.

Forgotten Lyres is a musical response to Percy Bysshe Shelley's poem Mutability, which depicts the fragility and unpredictable nature of human life. Four independent chamber ensembles make up the performing forces of Forgotten Lyres; the musicians evoke the topics of Shelley's text as they interact and coordinate with one another according to a variety of paradigms and without the use of a conductor. This essay focuses on the approaches to coordination within and between ensembles, and the ways in which the musicians' interactions can evoke and convey Shelley's texts. The essay also examines works by Mel Powell, Toru Takemitsu, Witold Lutoslawski, and Pierre Boulez as examples and precursors for the coordination strategies employed in Forgotten Lyres.

The two fields of acousmatic music and site-specific conceptual art take strikingly different approaches to the notions of space and place. In this document, I describe how these two areas of aesthetic research diverge and relate to each other, focusing on how their unique approaches can be implemented in the practice of site-specific music composition. The first part of this document surveys the distinctive features of each of these fields, describing the particular differences between them in their approach to space and place. The contradictions between the two approaches are then briefly analyzed in reference to Georgina Born's understanding of music as fundamentally multitextual. In the second part of the document, I describe in detail how I implemented a site-specific approach when composing "…threaded through," a 16-channel audio, 6 video, site-specific installation for the UNT College of Music Main Building. In this, I describe how both the space and place of the UNT College of Music Main Building influenced my musical choices, visual content, and approach to audio and visual spatialization. The final part of the document contains a detailed score for realizing "…threaded through" in the location of the UNT College of Music Main Building.

Audiovisual concatenative synthesis is an analysis-driven granular technique using a corpus of multimedia data to sequence audio and video streams on a microtemporal level. This text outlines my development of this technique as a tool for multimedia composition, using my work, Replica, as a case study. The paper illustrates how the concepts of granular structure, gesture capture, and replication are integral not only to the software but to the architecture of the composition. In doing so, machine learning approaches to music and visual art are reviewed and related to my personal compositional practice. Additionally, I attempt to show how audiovisual concatenative synthesis provides a composer with strategies for shaping one's sense of time through disorienting audiovisual cues and tightly organized counterpoint between sound and image, stage and screen, and the real and virtual.

Starting in the mid-2010s VR's high cost of entry became low enough for consumers and artists to explore and experiment with the technology. There have been a few VR operas developed by medium to large sized teams such as Michel Van Der Aa's Eight (2018) and Alexander Schubert's ⁂ASTERISM⁂ (2021), but no widespread work has been produced by a small team comprising only a librettist and composer. Vessels engages in this process with a libretto written by Bea Goodwin and music, audio processing, visual design, and programming by Christopher Poovey. The first step in the process of creating Vessels was the creation of the song cycle Songs from Vessels for soprano, extended tenor, flute, bass flute, A clarinet, viola, contrabass, percussion, and live electronics. These songs are the basis of the micro-opera Vessels which presents recordings of the songs with live processing alongside two songs exclusive to the opera in a VR environment with immersive projections and audio. The development of an ensemble and electronic work along with a VR micro-opera necessitates the implementation and creation of software. Both the Grainflow and cpDelayNetworks packages for Cycling ‘74 Max are pivotal to audio processing in both versions of the work. In …

Based on the poetry of Jehanne Dubrow, professor of English at the University of North Texas, Stateside: An opera in one act uses the mythology of Penelope and Odysseus to tell a story of a modern day military wife. David T. Little's opera Soldier Songs, Sarah Kirkland Snider's song-cycle Penelope, and Stateside are dramatic musical works influenced by the genre, instrumentation, and formal structures of popular music that broadly deal with the emotional and internal elements of military life. These three works prioritize narrative structure of the text in relation to character, and employ elements of popular music harmony, melody, and structure. The critical essay analyzes selections from Soldier Songs and Penelope and explains the compositional process of Stateside. The creative document consists of the full score of Stateside: an opera in one act.