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Being able to transform an analog audio circuit into a digital model is a big deal for musicians, producers, and circuit benders alike. In this paper, we address some of the issues that arise when attempting to make such a digital model. Using the canonical state variable filter as the main point of interest in our schematic, we will walk through the process of making a signal flow graph, obtaining a transfer function, and making a usable digital filter. Additionally, we will address an issue that is common throughout virtual analog literature; reducing the very large expressions for each of the filter coefficients. Using a novel factoring algorithm, we show that these expressions can be reduced from thousands of operations down to tens of operations.
|Title of host publication||Proceedings of the 18th International Conference on Digital Audio Effects (DAFx-15)|
|Editors||Peter Svensson, Ulf Kristiansen|
|Place of Publication||Trondheim, Norway|
|Number of pages||8|
|Publication status||Published - 30 Nov 2015|
|Event||18th International Conference on Digital Audio Effects (DAFx-15) - Norwegian University of Science and Technology, Trondheim, Norway|
Duration: 30 Nov 2015 → 03 Dec 2015
|Conference||18th International Conference on Digital Audio Effects (DAFx-15)|
|Period||30/11/2015 → 03/12/2015|
Bibliographical noteRunner up for best paper
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