Parametric FIR design of propagation loss filters in digital waveguide string models

  • Van Walstijn M
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Abstract

One of the attractive features of sound synthesis by physical modeling is the potential to build acoustic-sounding digital instruments that offer more flexibility and different options in its design and control than their real-life counterparts. In order to develop such virtual-acoustic instruments, the models they are based on need to be fully parametric, i.e., all coefficients employed in the model are functions of physical parameters that are controlled either online or at the (offline) design stage. In this letter we show how propagation losses can be parametrically incorporated in digital waveguide string models with the use of zero-phase FIR filters. Starting from the simplest possible design in the form of a three-tap FIR filter, a higher-order FIR strategy is presented and discussed within the perspective of string sound synthesis with digital waveguide models.

Author-supplied keywords

  • Digital waveguides
  • loss filter design
  • simulation of string instruments
  • sound synthesis

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Authors

  • Maarten Van Walstijn

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