| Sumario: | I have been deeply involved in computer-aided composition since 1994 and developed a number of libraries for computer-aided composition software: initially for PatchWork, then for OpenMusic and more recently for PWGL. In this paper I show how to use PWGL's Multi-PMC engine, conceived by Mikael Laurson, to link three of my libraries: JBS-Profile, Morphologie and JBS-Constraints. I discuss why computer-aided composition is fundamental for writing music today by demonstrating a theoretical approach. The theory I expose in this paper is a short and resumed version of the Hyper Systemic Music Theory, which I published in 2007. This theory studies the musical properties of created musical material in order to define rules to generate musical developments. My attention is focused on the relation between local and global control, and I give an example of how to manage the two in the PWGL environment.
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