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J Acoust Soc Am. 2013 Feb;133(2):EL76-81. doi: 10.1121/1.4773287.

Derivation of a new banded waveguide model topology for sound synthesis.

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School of Arts, Media and Engineering, SenSIP Center, School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA.


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.

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