"Drawing from personally situated knowledge derived from creative practice research, I will illustrate some approaches to the generation of compositional materials bound to a creative philosophy centred around technology, economy and derivation. This philosophy broadens the view of authored materials to include not only the final performance of the music, but also draft and incomplete or unedited versions, inaccurate versions played by sight, adapted versions that are played in sections during rehearsal, unused recording takes and mistakes, incidental sounds from around performance, rehearsal and recording environments, even the sounds generated from travelling to and from the recording session - all of the music and sound resulting from situations, actions and incidents that occur as a direct result of the composition existing can be captured and potentially used to make more music. This approach maximises the amount of materials generated from a single musical composition, providing both an economical approach to theme and creation of a sound world, and a diverse, yet finite framework within which to explore possibilities and experiment. In terms of music production, it also functions as a device for the creation of original and authentic sound worlds for musical ideas to inhabit. This philosophy also acknowledges the collaborative nature of performance, and I will share examples from practice of experiments in human filtering, where intuitive responses from individuals form, inform and reform the creation of musical materials. The score is seen as the starting point of a creative process, the raw materials that are activated by people. In such cases the final recorded production offers a version of the work and a document of this process."