Optimizing Differentiated Discretization for Audio Circuits Beyond Driving Point Transfer Functions

François G. Germain, Kurt James Werner

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

2 Citations (Scopus)
294 Downloads (Pure)

Abstract

One goal of Virtual Analog modeling of audio circuits is to produce digital models whose behavior matches analog prototypes as closely as possible. Discretization methods provide a systematic approach to generate those models but they introduce frequency response error, such as the well-known frequency warping for the trapezoidal method. Recent work showed how using different discretization methods for each reactive elements could reduce such error. It further provided a procedure that optimizes that error according to a chosen metric through joint selection of the discretization parameters. In this work, we extend that approach to the general case of transfer functions with one input and an arbitrary number of out- puts expressed as linear combinations of the network variables. To demonstrate the validity of our approach, we apply the optimization procedure for the response of a Hammond organ vibrato/chorus ladder filter, a 19-output, 36th order filter, where each output frequency response presents many features spread across its passband.
Original languageEnglish
Title of host publicationProceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
Place of PublicationNew Paltz, NY, USA
Pages1-5
DOIs
Publication statusPublished - 11 Dec 2017
Event2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) - Mohank Mountain House, New Paltz, United States
Duration: 15 Oct 201718 Oct 2017
http://www.waspaa.com/

Conference

Conference2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)
CountryUnited States
CityNew Paltz
Period15/10/201718/10/2017
Internet address

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  • Activities

    • 1 Participation in conference

    2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA)

    Kurt Werner (Participant)

    15 Oct 201718 Oct 2017

    Activity: Participating in or organising an event typesParticipation in conference

    Cite this

    Germain, F. G., & Werner, K. J. (2017). Optimizing Differentiated Discretization for Audio Circuits Beyond Driving Point Transfer Functions. In Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) (pp. 1-5). https://doi.org/10.1109/WASPAA.2017.8170060