David Worrall (born 25 October 1954 in Newcastle NSW) is an Australian composer and sound artist working a range of genres, including data sonification, sound sculpture and immersive polymedia (a term he coined in 1986) as well as traditional instrumental music composition. Biography Worrall performs and exhibits internationally. He studied musical composition at The University of Sydney with Peter Sculthorpe, Ross Edwards, where he also studied mathematics and Western philosophy, and at The University of Adelaide with Richard Meale and Tristram Cary. Worrall's creative practice encompasses a number of endeavours: instrumental and electroacoustic composition, sound poetry and sound installations including those that utilise PIPES (Portable Immersive Polymedia Event Spaces). sometimes referred to as Portable Event Theatres (PETs). He is a programmer in several computer languages and has developed software for music composition, text transformation and sonification. His PhD dissertation was on the development of a software framework for the sonification of information in large or high-frequency multivariate data sets, such as those from securities trading engines. Worrall was appointed to the Faculty of Music at the University of Melbourne in 1979 to teach musical composition and undertake research in computer music. In addition to composition, orchestration, twentieth-century techniques and free improvisation, in 1981, before the advent of the personal computer, he designed and taught the first undergraduate course in computer music in Australia using a mainframe computer, and MusicC (a development of Dick Moore's CMusic, the most related extant child of Max Mathews' Music V, Csound ) and Gary Lee Nelson's Music Programming Library (written in APL). His music from this period includes the Albert H. Maggs Award commission Images for Two Pianos and the Seymour Group commissioned Glass Games for ensemble and computer–generated tape – the first Australian work in this format. Other notable works from this period include Mixtures and re-collections and ...with fish scales scattered.... In 1986 he was appointed director of the Electronic Music Studios at the Canberra School of Music. He established and became the foundation head of the Australian Centre for the Arts and Technology (ACAT) at the Australian National University in 1989, a position he held for over a decade. During that time, ACAT offered the first Australian postgraduate degrees in multimedia: considered a sub-discipline of the Electronic Arts, along with electroacoustic music and computer animation. Worrall's output from this period is dominated by electroacoustic (e.g. Harmonie du Soir), polymedia (e.g. Cords), computer