Thesis (M.M.)--University of North Texas, 2005. / System requirements: Adobe Acrobat Reader. Includes bibliographical references (p. 52-54).

Thesis (doctoral)--Universität zu Köln, 1994. / Includes bibliographical references (p. 236-246). Discography: p. 231-235.

A study of selected chance and indeterminate piano pieces was made with a two-fold purpose: (1) to provide an intermediate stage between the composition and performance of the selected works and (2) to illustrate the diverse ways spontaneity may be invoked. The investigation centered on three points: (1) the problems the performer might encounter in examining the pieces, (2) implications of the instructions and (3) possible realizations of the score. While each score examined showed a slightly different approach to chance or indeterminacy, the pieces within the two categories were seen to exhibit common features. Generalizations were made in three broad areas: (1) the instructions in the scores, (2) the notation and (3) possible solutions. The instructions in the indeterminate scores were found to be relatively straightforward; the performer is made aware of his choices or alternatives and manner of performance is discussed. Instructions in chance works are less explicit; the performer is not directed to any one solution. Some explanation of the notation is given and the performer is led to discover how extensive his freedoms are. Indeterminate works on the whole are found to use traditional notation. The notation may be altered in some way, but retains a resemblance to its traditional source. Chance notation is very diverse, but three general categories exist: (1) works using traditional notation, (2) works using traditional and non-traditional (graphic) notation and (3) works using only graphic notation. The possible solutions of indeterminate works are concerned with either the juxtaposition or the metric relationship of material. The degree to which the choices are guided varies in the works discussed. Possible solutions of the chance works involve interpretation of notation and various ideas presented in the instructions. The performer must respond in an individual way, drawing on his own ideas. In general, analyses of the works illustrated some features that might be expected in other chance and indeterminate works. / Arts, Faculty of / Music, School of / Graduate

Promulgation is an interactive composition in which the orchestra and computer communicate through musical motives contained in the Command Motive Score. The musical content as well as the highly organized aleatoric environment is controlled by a system of probabilities. The orchestra is divided into four ensembles of dissimilar instrumentation. The music consists of several scores that are performed different ways. The first score is the Command Motive Score performed by the computer. The second is the Prelude Score performed by the orchestra. The third is the Continuum Score performed by the orchestra. The fourth is a group of scores called Auxiliary Scores performed by each respective ensemble. The fifth is another group of four scores performed by trumpet, cello, piano, and tuba.

Digital technology provides a very powerful medium for musical creativity, and the way in which we interface and interact with computers has a huge bearing on our ability to realise our artistic aims. The standard input devices available for the control of digital music tools tend to afford a low quality of embodied control; they fail to realise our innate expressiveness and dexterity of motion. This thesis looks at ways of capturing more detailed and subtle motion for the control of computer music tools; it examines how this motion can be used to control music software, and evaluates musicians' experience of using these systems. Two new musical controllers were created, based on a multiparametric paradigm where multiple, continuous, concurrent motion data streams are mapped to the control of musical parameters. The first controller, Phalanger, is a markerless video tracking system that enables the use of hand and finger motion for musical control. EchoFoam, the second system, is a malleable controller, operated through the manipulation of conductive foam. Both systems use machine learning techniques at the core of their functionality. These controllers are front ends to RECZ, a high-level mapping tool for multiparametric data streams. The development of these systems and the evaluation of musicians' experience of their use constructs a detailed picture of multiparametric musical control. This work contributes to the developing intersection between the fields of computer music and human-computer interaction. The principal contributions are the two new musical controllers, and a set of guidelines for the design and use of multiparametric interfaces for the control of digital music. This work also acts as a case study of the application of HCI user experience evaluation methodology to musical interfaces. The results highlight important themes concerning multiparametric musical control. These include the use of metaphor and imagery, choreography and language creation, individual differences and uncontrol. They highlight how this style of interface can fit into the creative process, and advocate a pluralistic approach to the control of digital music tools where different input devices fit different creative scenarios.

The aim of this thesis is to investigate techniques for, and applications of automatic sound synthesizer programming. An automatic sound synthesizer programmer is a system which removes the requirement to explicitly specify parameter settings for a sound synthesis algorithm from the user. Two forms of these systems are discussed in this thesis: tone matching programmers and synthesis space explorers. A tone matching programmer takes at its input a sound synthesis algorithm and a desired target sound. At its output it produces a configuration for the sound synthesis algorithm which causes it to emit a similar sound to the target. The techniques for achieving this that are investigated are genetic algorithms, neural networks, hill climbers and data driven approaches. A synthesis space explorer provides a user with a representation of the space of possible sounds that a synthesizer can produce and allows them to interactively explore this space. The applications of automatic sound synthesizer programming that are investigated include studio tools, an autonomous musical agent and a self-reprogramming drum machine. The research employs several methodologies: the development of novel software frameworks and tools, the examination of existing software at the source code and performance levels and user trials of the tools and software. The main contributions made are: a method for visualisation of sound synthesis space and low dimensional control of sound synthesizers; a general purpose framework for the deployment and testing of sound synthesis and optimisation algorithms in the SuperCollider language sclang; a comparison of a variety of optimisation techniques for sound synthesizer programming; an analysis of sound synthesizer error surfaces; a general purpose sound synthesizer programmer compatible with industry standard tools; an automatic improviser which passes a loose equivalent of the Turing test for Jazz musicians, i.e. being half of a man-machine duet which was rated as one of the best sessions of 2009 on the BBC's 'Jazz on 3' programme.

No description available.

This thesis explores the possibilities of communication in the context of a sound composition. In RevealingReveilingReveling, a series of questions concerning communication posed by John Cage, coupled with an extension of those questions posed by myself, are set to recorded sounds-in-the-world. The intention is to create a greater awareness of that which there is to listen in our world. The first part of this essay discusses influences of philosophical thought during the process of composing RevealingReveilingReveling. Two distinct twentieth-century thinkers that have impacted the creation of this piece and their areas of thought are Martin Heidegger: language and Being; and John Cage: sound, silence, and awareness. The second part of the essay is a structural analysis of the piece, discussing the recording of Cage's questions, sounds-in-the-world, sound-manipulation techniques and thought-processes, as well as periodic mention the aesthetic decisions made.

No description available.

The thesis explores the relationships between sound and mobility through an examination of sound art. The research engages with the intersection of sound, mobility and art through original empirical work and theoretically through a critical engagement with sound studies. In dialogue with the work of De Certeau, Lefebvre, Huhtamo and Habermas in terms of the poetics of walking, rhythms, media archeology and questions of publicness, I understand sound art as an experimental mobile and public space. The thesis establishes and situates the emerging field of mobile sound art by mapping three key traditions of mobile sound art - locative art, sound art and public art - and creates a taxonomy of mobile sound art by defining four categories: 'placing sounds', 'sound platforms', 'sonifying mobility' and 'musical instruments' (each represented by one case study). In doing so it develops a methodology that is attentive to the specifics of the sonic and mobile of media experience. I demonstrate how sonic interactions and embodied mobility are designed and experienced in specific ways in each of the four case studies - 'Aura' by Symons (UK), 'Pophorns' by Torstensson and Sandelin (Sweden), 'SmSage' by Redfern and Borland (US) and 'Core Sample' by Rueb (US) (all 2007). In tracing the topos of the musical telephone, discussing the making and breaking of relevant micro publics, accounting for the polyphonies of footsteps and unwrapping bundles of rhythms, this thesis contributes to understanding complex media experiences in hybrid spaces. In doing so it critically sheds light on the quality of sonic artistic experiences, the audience engagement with urban, public and networked spaces and the relationship between sound art and everyday media experience. My thesis provides valuable insight into auditory ways of mobilising and making public spaces, non-verbal and embodied media practices, and rhythms and scales of mobile media experiences.