Virtual analog models of the Lockhart and Serge wavefolders

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Esqueda, Fabián
dc.contributor.author Pöntynen, Henri
dc.contributor.author Parker, Julian D.
dc.contributor.author Bilbao, Stefan
dc.date.accessioned 2018-02-09T09:55:47Z
dc.date.available 2018-02-09T09:55:47Z
dc.date.issued 2017-12-20
dc.identifier.citation Esqueda , F , Pöntynen , H , Parker , J D & Bilbao , S 2017 , ' Virtual analog models of the Lockhart and Serge wavefolders ' Applied Sciences (Switzerland) , vol 7 , no. 12 , 1328 . DOI: 10.3390/app7121328 en
dc.identifier.issn 2076-3417
dc.identifier.other PURE UUID: 3862b180-77ae-402d-842c-402369d2f866
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/virtual-analog-models-of-the-lockhart-and-serge-wavefolders(3862b180-77ae-402d-842c-402369d2f866).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85038859544&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/16820117/esqueda_et_al_applsci_07_01328_v2_1.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/29786
dc.description.abstract Wavefolders are a particular class of nonlinear waveshaping circuits, and a staple of the "West Coast" tradition of analog sound synthesis. In this paper, we present analyses of two popular wavefolding circuits-the Lockhart and Serge wavefolders-and show that they achieve a very similar audio effect. We digitally model the input-output relationship of both circuits using the Lambert-W function, and examine their time- and frequency-domain behavior. To ameliorate the issue of aliasing distortion introduced by the nonlinear nature of wavefolding, we propose the use of the first-order antiderivative method. This method allows us to implement the proposed digital models in real-time without having to resort to high oversampling factors. The practical synthesis usage of both circuits is discussed by considering the case of multiple wavefolder stages arranged in series. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Applied Sciences (Switzerland) en
dc.relation.ispartofseries Volume 7, issue 12 en
dc.rights openAccess en
dc.subject.other Materials Science(all) en
dc.subject.other Instrumentation en
dc.subject.other Engineering(all) en
dc.subject.other Process Chemistry and Technology en
dc.subject.other Computer Science Applications en
dc.subject.other Fluid Flow and Transfer Processes en
dc.subject.other 213 Electronic, automation and communications engineering, electronics en
dc.subject.other 114 Physical sciences en
dc.title Virtual analog models of the Lockhart and Serge wavefolders en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Signal Processing and Acoustics
dc.contributor.department School services, ELEC
dc.subject.keyword Acoustic signal processing
dc.subject.keyword Antialiasing
dc.subject.keyword Circuit modeling
dc.subject.keyword Music
dc.subject.keyword Nonlinear waveshaping
dc.subject.keyword Synthesis
dc.subject.keyword Materials Science(all)
dc.subject.keyword Instrumentation
dc.subject.keyword Engineering(all)
dc.subject.keyword Process Chemistry and Technology
dc.subject.keyword Computer Science Applications
dc.subject.keyword Fluid Flow and Transfer Processes
dc.subject.keyword 213 Electronic, automation and communications engineering, electronics
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201802091282
dc.identifier.doi 10.3390/app7121328
dc.type.version publishedVersion


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