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Jan C. Schacher
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Journal Articles
Publisher: Journals Gateway
Computer Music Journal (2014) 38 (3): 49–63.
Published: 01 September 2014
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In mapping for computer music and interactive media, flocking algorithms represent a special case, offering dynamic, self-organized domain translations. In this article we attempt a classification of fundamental mapping relationships that can be established with the help of swarm simulations. By regarding flocks as systems of abstract entities, a number of models arise that deal with the reassignment of perceptual and semantic qualities to the simulated entities. These models represent basic mapping processes, but become domain-specific when used for music and interactive art. To illustrate these concepts, we outline a number of strategies that relate to musical practice, fostering an understanding of the role of swarm simulations in mapping. We show two artistic use cases where these concepts are applied in an exemplary manner. In the first artwork, swarms play a central role in the compositions presented in an audiovisual installation, and serve as an intermediate translation space between audience and artwork. In the second realization, swarms interact with dancers and together they control the visual and musical aspects of the piece. Both examples show how the emergent behavior of flocks can be mapped conceptually and can evoke natural phenomena, thus making the mapping relationships less predictable and more organic.
Journal Articles
Publisher: Journals Gateway
Computer Music Journal (2013) 37 (1): 11–22.
Published: 01 March 2013
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SpatDIF, the Spatial Sound Description Interchange Format, is an ongoing collaborative effort offering a semantic and syntactic specification for storing and transmitting spatial audio scene descriptions. The SpatDIF core is a lightweight minimal solution providing the most essential set of descriptors for spatial sound scenes. Additional descriptors are introduced as extensions, expanding the namespace and scope with respect to authoring, scene description, rendering, and reproduction of spatial sound. A general overview presents the principles informing the specification, as well as the structure and the terminology of the SpatDIF syntax. Two use cases exemplify SpatDIF's potential for pre-composed pieces as well as interactive installations, and several prototype implementations that have been developed show its real-life utility.