Derivation of a new banded waveguide model topology for sound synthesis

Banded waveguide (BWG) synthesis is an efficient method for real-time physical modeling of dispersive and multidimensional sounding objects, affording simulation of complex interactions, such as bowing. Current implementations, however, use nonphysical design parameters and produce a range of output...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2013-02, Vol.133 (2), p.EL76-EL81
Main Authors: Fink, Alex M, Spanias, Andreas S, Cook, Perry R
Format: Article
Language:English
Subjects:
Acoustics
Computer Simulation
Models, Theoretical
Motion
Nonlinear Dynamics
Signal Processing, Computer-Assisted
Sound
Sound Spectrography
Time Factors
Vibration
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Description
Summary:Banded waveguide (BWG) synthesis is an efficient method for real-time physical modeling of dispersive and multidimensional sounding objects, affording simulation of complex interactions, such as bowing. Current implementations, however, use nonphysical design parameters and produce a range of outputs that do not match equivalently designed modal and digital waveguide (DWG) models. This letter proposes a new topology for implementing BWG models without arbitrary parameters. The impulse response of the proposed model is identical to that of equivalent Karplus-Strong type and lumped modal models. Test of a nonlinear bi-directional bowed-string model demonstrates improved attack characteristics relative to prior BWG models.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4773287