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Engineering Brief

Realistic Procedural Sound Synthesis of Bird Song Using Particle Swarm Optimization

Authors: Zúñiga, Jorge; Reiss, Joshua D.

AES Convention 147 · Paper 555 · October 2019

Abstract

We present a synthesis algorithm for approximating bird song using particle swarm optimization to match real bird recordings. Frequency and amplitude envelope curves are first extracted from a bird recording. Further analysis identifies the presence of even and odd harmonics. A particle swarm algorithm is then used to find cubic Bezier curves which emulate the envelopes. These curves are applied to modulate a sine oscillator and its harmonics. The synthesized syllable can then be repeated to generate the sound. Thirty-six bird sounds have been emulated this way, and a real-time web-based demonstrator is available, with user control of all parameters. Objective evaluation showed that the synthesized bird sounds captured most audio features of the recordings.

Details

Published in
AES Convention 147
AES Convention
147
Paper number
555
Publication date
October 6, 2019
Session subject
Audio Signal Processing
Affiliation
Queen Mary University of London, London, UK (See document for exact affiliation information.)
Type
Engineering Brief