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Journal Article

A Modified Additive Synthesis Method Using Source-Filter Model

Authors: Korvel, Grazina; Šimonyte, Virginija; Slivinskas, Vytautas

Journal of the Audio Engineering Society · Volume 63 · Issue 6 · pp. 443–450 · June 2015

Abstract

A modified additive synthesis method using a combination of additive synthesis and source filter modeling has been proposed for musical instruments. When applied to a trumpet, the results are perceived as being less synthetic than additive synthesis by itself. Since harmonics as well as inharmonics are important for resynthesized sound quality, the authors segment the frequency range into bands each of which contains a single harmonic with inharmonics. A sinusoidal model is not sufficient to represent both harmonics and inharmonics. A more complex model of a quasipolynomial in each of the frequency bands is proposed. The quasipolynomial can be obtained as the response of a special linear filter to the unit impulse. Thus each harmonic is obtained using a source-filter model. The inputs of this filter are periodic pulses with time-varying amplitudes and slightly varying periods. Two listening tests were performed to evaluate the perceived quality.

Details

Publication
Journal of the Audio Engineering Society
Volume
63
Issue
6
Pages
443–450
Publication date
June 6, 2015
Affiliation
Vilnius University Institute of Mathematics and Informatics, Vilnius, Lithuania; Lithuanian University of Educational Sciences, Vilnius, Lithuania (See document for exact affiliation information.)
Type
Journal Article