Digital Waveguide Synthesis of the Geomungo with a Time-Varying Loss Filter

Kim S, Kim M, Yeo WS. Digital Waveguide Synthesis of the Geomungo with a Time-Varying Loss Filter. J Audio Eng Soc. 2013;61(1/2):50-61. Available from: https://aes.org/publications/elibrary-page/?id=16667

@article{Kim2013_16667,
  author = {Kim, Seunghun and Kim, Moonseok and Yeo, Woon Seung},
  title = {{Digital Waveguide Synthesis of the Geomungo with a Time-Varying Loss Filter}},
  journal = {Journal of the Audio Engineering Society},
  volume = {61},
  number = {1/2},
  pages = {50--61},
  year = {2013},
  month = jan,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16667}
}

TY  - JOUR
TI  - Digital Waveguide Synthesis of the Geomungo with a Time-Varying Loss Filter
AU  - Kim, Seunghun
AU  - Kim, Moonseok
AU  - Yeo, Woon Seung
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 61
IS  - 1/2
SP  - 50
EP  - 61
PY  - 2013
DA  - 2013/01/06
UR  - https://aes.org/publications/elibrary-page/?id=16667
PB  - Audio Engineering Society
LA  - en
AB  - Physical models of musical instruments are often the basis for computer synthesis of the sound when played. By manipulating control parameters of the model to mimic the performer’s actions, a good imitation of the music can be achieved. A digital waveguide synthesis of the geomungo, a Korean traditional plucked string instrument, must take into account the fact that vigorous playing techniques produce extreme vibrato with a noticeably fluctuating in the decay of the harmonics. To model pitch fluctuation and the decay characteristics of its harmonic partials, a time-varying loss filter with a sinusoidal loop gain is used. The model uses a generalized form of the Karplus-Strong algorithm with a one-pole filter to model loss, and a Lagrange interpolation filter to implement the fundamental frequency. A real-time system shows the potential for creating a virtual geomungo.
ER  -