A nonlinear digital feedback oscillator based vibrato control model for singing synthesis

By investigating the production mechanism of vocal vibrato, a nonlinear digital feedback oscillator based vibrato control model was proposed. The feedback oscillation behaviour of laryngeal agonist-antagonist muscles is modeled by a self-oscillated feedback oscillator, in which a nonlinear limiter i...

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Bibliographic Details
Published in2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP) pp. 115 - 119
Main Authors Fengyun Zhu, Ziye Fan, Xihong Wu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2014
Subjects
Frequency control
Frequency modulation
Muscles
Oscillators
Psychoacoustic models
Psychoacoustics
Singing perception
Singing synthesis
Vibrato control model
Vocal vibrato
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Summary:By investigating the production mechanism of vocal vibrato, a nonlinear digital feedback oscillator based vibrato control model was proposed. The feedback oscillation behaviour of laryngeal agonist-antagonist muscles is modeled by a self-oscillated feedback oscillator, in which a nonlinear limiter is introduced to describe the physical limitation of muscle activity. The proposed model could provide a flexible control over the following dynamic characteristics of vocal vibrato: (1) the attack and release; (2) irregularities of the vibrato rate and extent; (3) the increasing vibrato rate at the end of a note. Psychoacoustic experiments were conducted to evaluate the model and to demonstrate how these characteristics influence singing perception. Experimental results show that the dynamic characteristics affect the quality of vocal vibrato. Moreover, introducing attack and release could significantly improve the naturalness of synthetic singing voice.
ISBN:9781479954018
1479954012
DOI:10.1109/ChinaSIP.2014.6889213