An example of how Fortune’s sweepline algorithm may be used to construct an online voronoi diagram of sound onsets. Sweepline This java software was adapted from the work of Odgaard and Nielsen so that it could be controlled via OSC network messages. The modified version is available here.
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Animated apollonius diagrams
An Apollonius diagram shows Voronoi edges between discs of varying sizes. Here is an animation where the sites move and reduce in size from frame to frame. By increasing the angle of direction the sites form a spiral. Apollonius spiral This animation is the same but the sites oscillating perpendicular to the direction of travel. …
Apollonius diagrams and the Representation of Sounds and Music
The abstract from our paper submitted to ISVD07: We introduce the use of weighted medial graph structures to represent sounds and musical events. Such structures permit the building of hierarchical neighborhood relationships (symmetries) while mapping time to a weight (of a note, or event). This is useful to relate perceptual organisations (groupings in the …
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Welcome
Welcome to another blog, in which we plan to document our findings in the area of music visualisation. Your comments on any part of the site or its contents would be most welcome. The ‘logo’ at the top of the page depicts a Voronoi diagram of discrete points along a sine wave and its cosine. …