This thesis traces the development of a number of mobile computer music systems and their use in ensemble percussion performances. The research is motivated by the challenges of working with laptop based computer music systems in ensemble situations. The aims were to develop elegant, portable, and flexible computer music tools, to make these tools accessible to other percussionists, and to discover the opportunities that they enable in performance practice.These aims have been explored through three musical projects for percussion and Apple's iOS devices: Nordlig Vinter, a suite of duo compositions; and two collaborative works, 3p3p and Snow Music developed together with two other percussionists.Articulated from a performer's perspective, this artistic research examines a number of software frameworks for developing mobile computer music applications. The development, rehearsal process and performances of the musical projects have been documented with video and audio recordings.An ethnographic investigation of this data has given insight into the limitations and affordances of mobile computer music devices in a variety of performance contexts. All of the projects implemented elegant computer music setups and the limited visual interfaces of the mobile devices demanded simple but clear interface design. In Snow Music in particular, "percussive" interaction with the mobile devices along with an improvised performance practice contributed to a collaborative development cycle. This process revealed some of the limits of expression with the computer sounds used and led to a very successful series of performance outcomes. / <p>Validerat; 20120614 (anonymous)</p>

Duet playing should form an integral part of the development of all young pianists. Personal development, reduction of performance anxiety and skills such as listening, rhythmic stability and sight-reading are but a few components that can be improved through duet playing. Piano playing is mostly a lonely activity and one of the best ways to counteract this isolation is to become involved in collaborative musicianship through duet playing. The piano duet has an extended history, beginning in the Pre-Baroque and reaching its pinnacle during the Romantic period. After dwindling interest in the early twentieth century, renewed attention has recently been given internationally to duet playing and composition, resulting in large numbers of new duet publications. It is a matter of concern that duet playing is sadly neglected in the tuition of many beginners. This may be due to factors such as lack of knowledge of duet repertoire, difficulty in obtaining such repertoire and problems with incorporating still another aspect in the piano lesson. To provide some guidelines for the teacher, practical considerations such as partner compatibility, leadership, repertoire and publication choice, memorising, page turning and the preparation process have been investigated. Technical aspects are dealt with because adjustments are needed during duet playing compared to solo playing. These include seating, the position of the arms and hands, fingering, dynamic variety, balance, timing and the use of pedal. A factor contributing to the neglect of incorporating duet playing in teaching seems to be the difficulty in sourcing appropriate repertoire. Duet publications generally offer only limited guidelines concerning grading whereas duet repertoire lists include mostly advanced compositions using undefined grading over a broad spectrum. Beginner repertoire is seldom referred to in duet repertoire lists, which complicates the process of finding appropriate beginner repertoire. The fact that sheet music suppliers only have a limited variety of duet publications available exacerbates the problem. The researcher has endeavoured to find a solution for this problem by devising a selective syllabus of beginner duets. Because no relevant grading system is available, such a system had to be devised. The publications of six well-known piano beginner methods were analysed to establish the basic sequence in which musical concepts are introduced to the beginner pianist. Following these guidelines a grading system of eight levels has been developed. A search for duet repertoire has been undertaken by scrutinising a piano curriculum, various piano duet examination syllabi as well as the researcher’s duet collection, and by investigating the availability of repertoire in libraries, sheet music suppliers and on the Internet. Subsequently suitable duets were played and graded. The outcome of this dissertation is a suggested graded duet syllabus for the beginner pianist. A compact disc of selected piano duets performed by the author and a partner is included. / Dissertation (MMus)--University of Pretoria, 2010. / Music / unrestricted