Potentiometer Law Modelling and Identification for Application in Physics-Based Virtual Analogue Circuits

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Abstract

Physical circuit models have an inherent ability to simulate the behaviour of user controls as exhibited by, for example, potentiometers. Working to accurately model the user interface of musical circuits, this work provides potentiometer ‘laws’ that fit to the underlying characteristics of linear and logarithmic potentiometers. A strategy of identifying these characteristics is presented, exclusively using input/output measurements and as such avoiding device disassembly. By breaking down the identification problem into one dimensional, search spaces characteristics are successfully identified. The proposed strategy is exemplified through a case study on the tone stack of the Big Muff Pi.
Original languageEnglish
Title of host publicationProceedings of the 22nd International Conference on Digital Audio Effects (DAFx-19)
Place of PublicationBirmingham
Publisher.John Wiley & Sons, Ltd
Number of pages8
ISBN (Electronic)978-0-470-66599-2
Publication statusPublished - 02 Sep 2019

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