A Finite Difference Method for the Excitation of a Digital Waveguide String Model

Gabrielli L, Remaggi L, Squartini S, Välimäki V. A Finite Difference Method for the Excitation of a Digital Waveguide String Model. In: AES Convention 134. Audio Engineering Society; 2013. Paper 8816. Available from: https://aes.org/publications/elibrary-page/?id=16717

@inproceedings{Gabrielli2013_16717,
  author = {Gabrielli, Leonardo and Remaggi, Luca and Squartini, Stefano and Välimäki, Vesa},
  title = {{A Finite Difference Method for the Excitation of a Digital Waveguide String Model}},
  booktitle = {AES Convention 134},
  note = {Paper 8816},
  year = {2013},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16717}
}

TY  - CPAPER
TI  - A Finite Difference Method for the Excitation of a Digital Waveguide String Model
AU  - Gabrielli, Leonardo
AU  - Remaggi, Luca
AU  - Squartini, Stefano
AU  - Välimäki, Vesa
T2  - AES Convention 134
M1  - Paper 8816
PY  - 2013
DA  - 2013/05/06
UR  - https://aes.org/publications/elibrary-page/?id=16717
PB  - Audio Engineering Society
LA  - en
AB  - With Digital Waveguide modeling (DWG) a number of excitation methods have been proposed to feed the delay line properly. Generally speaking these may be based on signal models fitting recorded samples, excitation signals extracted from recorded samples or digital filter networks. While allowing for a stable, computationally efficient sound emulation, they may be unable to emulate secondary effects generated by the physical interaction of, e.g., distributed interaction of string and hammer. On the other hand, FDTD (Finite Difference Time Domain) models are more accurate in the emulation of the physical excitation mechanism at the expense of a higher computational cost and a complex coefficient design to ensure numerical stability. In this paper a mixed model is proposed composed of a two-step FDTD model, a commuted DWG, and an adaptor block to join the two sections. Properties of the model are provided and computer results are given for the case of the Clavinet tangent-string mechanism as an example application.
ER  -