Large-scale real-time Modular Physical Modeling Sound Synthesis

Stefan Bilbao, Michele Ducceschi, Craig Webb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Due to recent increases in computational power, physical modeling synthesis is now possible in real time even for relatively complex models. We present here a modular physical modeling instrument design, intended as a construction framework for string- and bar-based instruments, alongside a mechanical network allowing for arbitrary nonlinear interconnection. When multiple nonlinearities are present in a feedback setting, there are two major concerns. One is ensuring numerical stability, which can be approached using an energy-based framework. The other is coping with the computational cost associated with nonlinear solvers---standard iterative methods, such as Newton-Raphson, quickly become a computational bottleneck. Here, such iterative methods are sidestepped using an alternative energy conserving method, allowing for great reduction in computational expense or, alternatively, to real-time performance for very large-scale nonlinear physical modeling synthesis. Simulation and benchmarking results are presented.
Original languageEnglish
Title of host publicationProceedings of the 22nd International Conference on Digital Audio Effects
Place of PublicationBirmingham, UK
PublisherDAFx
Number of pages8
Publication statusPublished - 9 Sep 2019

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