This is PhD submission is both practical and theoretical. The practical element consists of nine electroacoustic compositions. The dissertation acts as a discursive accompaniment to the compositions, addressing many of the contextual and philosophical issues that have arisen during the compositional process and the perfannance of the works. It charts out discourse surrounding the different genres of electroacoustic music that the works relate to as well as examining models of work in the respective genres (i. e. sonic art, text.. sound, acousmatic composition, inusique concrite and soundscape composition), and places them into a broader cultural and historical context. Chapter 2 is concerned with the impact of the advent of, and subsequent rapid development of electroacoustically mediatized sound on society and the individual. It relates a diverse mix of conjectures on disembodied sound from different fields, practices and cultures, including sonic art. Chapter3 explorest he emerging genre of soundscapec omposition. After dealing with the genre's lineage and accompanying discourse by composers of soundscape, it develops a relationship between the practice of soundscape composition and contemporary ethnographic practice and theory on ethnographic methodologies. The final section develops a soundscape compositional process with the practice of thefldneur. Chapter 4 relates the aesthetics of acousmatic music to philosophical, physiological and spiritual notions of the sublime throughout the ages. It concludes that acousmatic music has a distinct role to play in imparting sublime experiences. Chapter 5 documents and comments on those projects, which were undertaken with the following performers/ writers/ collaborators: Alaric Sumner, Alice Oswald and Tony Lopez. These projects demonstrate a number of different collaborative relationships between composer and writer and different configurations of acousmatic music and poetry

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