Real-Time Polyphonic Octave Doubling for the Guitar

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.advisorKargo, Jens Peter
dc.contributor.advisorArknaes, Lars
dc.contributor.authorThuillier, Etienne
dc.contributor.schoolSähkötekniikan korkeakoulufi
dc.contributor.supervisorVälimäki, Vesa
dc.date.accessioned2016-04-20T10:36:03Z
dc.date.available2016-04-20T10:36:03Z
dc.date.issued2016-04-04
dc.description.abstractThis thesis studies digital signal processing solutions for enriching live guitar sound by way of mixing-in octave-doubled versions of the chords and melodies performed on the instrument in real-time. Following a review of techniques applicable for real-time polyphonic octave doubling, four candidate solutions are proposed, amongst which two novel methods: ERB-PS2 and ERB-SSM2. Performance of said candidates is compared to that of three state of the art effect pedal offerings of the market. In particular, an evaluation of the added roughness and transient alterations introduced by each solution in the output sound is conducted. The ERB-PS2 method, which consists in doubling the instantaneous phases of the sub-bands signals extracted with a constant-ERB-bandwidth non-decimated IIR filter bank, is found to provide the best overall performance amongst the candidates. This novel solution provides greatly reduced latency compared to the baseline pedals, with comparable, and in some case improved, sound quality.en
dc.format.extent66+7
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/20158
dc.identifier.urnURN:NBN:fi:aalto-201604201818
dc.language.isoenen
dc.locationP1fi
dc.programmeTLT - Master’s Programme in Communications Ecosystem (TS2005)fi
dc.programme.majorAcoustics and Audio Signal Processingen
dc.programme.mcodeS3004fi
dc.rights.accesslevelopenAccess
dc.subject.keywordreal-timeen
dc.subject.keywordpitch-shiftingen
dc.subject.keywordmulti-resolutionen
dc.subject.keywordsub-banden
dc.subject.keywordmodulationen
dc.subject.keywordroughnessen
dc.titleReal-Time Polyphonic Octave Doubling for the Guitaren
dc.typeG2 Pro gradu, diplomityöen
dc.type.okmG2 Pro gradu, diplomityö
dc.type.ontasotMaster's thesisen
dc.type.ontasotDiplomityöfi
dc.type.publicationmasterThesis
local.aalto.idinssi53452
local.aalto.openaccessyes
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