Jonathan Leshnoff is one today's foremost contemporary American composers. His percussion compositions are significant compositions to the percussion solo, chamber, and concerto repertoire. This study is a tonal analysis on his marimba solo, Run (2003), with comparative analyses on his percussion chamber work, …without a chance (2002), and Concerto for Two Percussionists and Orchestra (2011).

This submission consists of three parts, found in two volumes. Volume 1 consists of a folio of eight original compositions, composed during the tenure of my PhD candidature at the University of Adelaide. These works cover a range of media, including symphony orchestra with soloist, large chamber ensemble, string quartet with soprano solo, guitar quintet, mixed choir and vocal trio. Volume 2 presents an exegesis that contains commentary on the genesis and analysis of the submitted works, together with an explanation of certain modal processes that have been explored and applied. Volume 2 also contains three minor compositions that were composed during my candidature, presented as an Appendix. These are analysed and referenced within the exegesis discussion. Two CDs of live recordings of some of the submitted works are included as part of Volume 2. The Exegesis, Appendix and Sound Recordings found in Volume 2 act as secondary material to support the primary material presented in Volume 1. Of the eight compositions presented in Volume 1, Skin, Metal, Wood – Concerto for Percussion and Orchestra is the major orchestral work of over 30 minutes, in fulfilment of submission requirements. The musical works contained within this submission offer a personal exploration of certain modal processes. In particular, the tonal principles of modulation and key relationships have been transferred into a modal system that features church, folk and synthetic modes. The exploration of modal processes has been carried out through the works themselves, and the accompanying exegesis acts as a commentary on the genesis of the works. / Thesis (Ph.D.) - University of Adelaide, Elder Conservatorium of Music, 2008

Title page, table of contents and abstract; v.2: table of contents; v.3: table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / This doctoral submission comprises three volumes and is entitled Twistonality: A Personal Exploration. Volume One consists of a portfolio of eleven original compositions, Volume Two is an exegesis and Volume Three contains live and/or computer-generated recordings of the music. The works are scored for a variety of instrumental and vocal combinations. The compositions explore the use of tonality as a basis for the creation of a uniquely personal style which incorporates musical gestures encountered in both traditional and contemporary performance practice. The term 'twistonality', devised for this submission, refers to a musical language in which a composer may express original ideas by twisting forms and tonal structures already resident in the conscious or subconscious memory in order to reflect his or her emotional reality as experienced through music. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1283916 / Thesis (Ph.D.) -- University of Adelaide, Elder Conservatorium of Music, 2007

Title page, table of contents and abstract; v.2: table of contents; v.3: table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / This doctoral submission comprises three volumes and is entitled Twistonality: A Personal Exploration. Volume One consists of a portfolio of eleven original compositions, Volume Two is an exegesis and Volume Three contains live and/or computer-generated recordings of the music. The works are scored for a variety of instrumental and vocal combinations. The compositions explore the use of tonality as a basis for the creation of a uniquely personal style which incorporates musical gestures encountered in both traditional and contemporary performance practice. The term 'twistonality', devised for this submission, refers to a musical language in which a composer may express original ideas by twisting forms and tonal structures already resident in the conscious or subconscious memory in order to reflect his or her emotional reality as experienced through music. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1283916 / Thesis (Ph.D.) -- University of Adelaide, Elder Conservatorium of Music, 2007

Title page, table of contents and abstract; v.2: table of contents; v.3: table of contents only. The complete thesis in print form is available from the University of Adelaide Library. / This doctoral submission comprises three volumes and is entitled Twistonality: A Personal Exploration. Volume One consists of a portfolio of eleven original compositions, Volume Two is an exegesis and Volume Three contains live and/or computer-generated recordings of the music. The works are scored for a variety of instrumental and vocal combinations. The compositions explore the use of tonality as a basis for the creation of a uniquely personal style which incorporates musical gestures encountered in both traditional and contemporary performance practice. The term 'twistonality', devised for this submission, refers to a musical language in which a composer may express original ideas by twisting forms and tonal structures already resident in the conscious or subconscious memory in order to reflect his or her emotional reality as experienced through music. / http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1283916 / Thesis (Ph.D.) -- University of Adelaide, Elder Conservatorium of Music, 2007

This study deals with trombone soloists and music of nineteenth-century Germany. Much of the discussion is based on the influence of two trombone virtuosos, Carl Traugott Queisser (1800-1846) and Friedrich August Belcke (1795- 1874) . Finally, a style and form analysis is given of several representative trombone compositions of the period. These include Ferdinand David's Concertino. Op. 4, Friedebald Grafe's Concerto. and Josef Serafin Alschausky's Concerto No. I.