Juliette Chabassier | Openwind, a virtual workshop assisting wind instrument makers

The software openwind allows the computation of the acoustic response of a wind musical instrument in the harmonic and temporal regimes, as well as the sound synthesis of several types of wind instruments. The Openwind webpage lists all the possible ways of using openwind:

online with the graphical demo interface
offline by installing the python package
offline by installing directly the sources

The documentation allows to install the software, begin to use it easily thanks to tutorials, learn to use advanced features thanks to the “how to”, and provides a deep documentation of the code structure.

References

JSV

Direct computation of modal parameters for musical wind instruments

Chabassier, Juliette, and Auvray, Roman

Journal of Sound and Vibration Jun 2022

Abs URL DOI

Parameters of modal expressions for the input impedance of wind instruments can be computed from the Telegrapher equations with radiating boundary conditions at the bell. One dimensional finite elements are used for spatial discretization. Provided that the models can be put under a specified form, the modal parameters can be computed directly by solving a generalized eigenvalue problem. Viscothermal effects can also be accounted for, as well as open or closed toneholes. Modal shapes can be visualized along the instrument. Parameters of modal expressions for the input admittance of flute-like instruments can also be computed.
AAuA

A comparison of a one-dimensional finite element method and the transfer matrix method for the computation of wind music instrument impedance

Tournemenne, Robin, and Chabassier, Juliette

Acta Acustica united with Acustica Jun 2019

Abs URL DOI PDF

This work presents a computation tool for the calculation of wind instrument input impedance in the context of linear planar wave propagation with visco-thermal losses. The originality of the approach lies in the usage of a specific and simple 1D finite element method (FEM). The popular Transfer Matrix Method (TMM) is also recalled and a seamless formulation is proposed which unifies the cases cylinders vs. cones. Visco-thermal losses, which are natural dissipation in the system, are not exactly taken into account by this method when arbitrary shapes are considered. The introduction of an equivalent radius leads to an approximation that we quantify using the FEM method. The equation actually solved by the TMM in this case is exhibited. The accuracy of the two methods (FEM and TMM) and the associated computation times are assessed and compared. Although the TMM is more efficient in lossless cases and for lossy cylinders, the FEM is shown to be more efficient when targeting a specific precision in the realistic case of a lossy trumpet. Some additional features also exhibit the robustness and flexibility of the FEM over the TMM. All the results of this article are computed using the open-source python toolbox OpenWind.
FA 2020

Time-domain simulation of a dissipative reed instrument

Thibault, Alexis, and Chabassier, Juliette

In e-Forum Acusticum 2020 Dec 2020

URL
FA 2023

Openwind: a software to simulate wind instruments, as a tool for acoustic teachers

Ernoult, Augustin, Cabaret, Jérémy, and Chabassier, Juliette

In Forum Acusticum 2023 - 10th Convention of the European Acoustics Association Sep 2023

URL PDF

ISMA 2019

The virtual workshop OpenWInD: Towards an optimal design tool of wind instruments for makers

Castera, Guillaume, Chabassier, Juliette, Ernoult, Augustin, Thibault, Alexis, and Tournemenne, Robin

In ISMA 2019 - International Symposium on Music Acoustics Sep 2019

Bib URL

@inproceedings{castera:hal-02432750,
  title = {{The virtual workshop OpenWInD: Towards an optimal design tool of wind instruments for makers}},
  author = {Castera, Guillaume and Chabassier, Juliette and Ernoult, Augustin and Thibault, Alexis and Tournemenne, Robin},
  url = {https://hal.archives-ouvertes.fr/hal-02432750},
  booktitle = {{ISMA 2019 - International Symposium on Music Acoustics}},
  address = {Detmold, Germany},
  year = {2019},
  month = sep,
  keywords = {Reed mechanism ; Finite element method ; Time discretization ; Wind instruments ; Radiation impedance ; openwind},
  hal_id = {hal-02432750},
  hal_version = {v1},
  bibtex_show = {true},
  abbr = {ISMA 2019}
}

FA 2020

The Virtual Workshop OpenWinD : a Python Toolbox Assisting Wind Instrument Makers

Chabassier, Juliette, Ernoult, Augustin, Geber, Olivier, Humeau, Augustin, Thibault, Alexis, Tournemenne, Robin, and Van Baarsel, Tobias

In e-Forum Acusticum Dec 2020

URL DOI PDF
CFA 2018

L’atelier virtuel : vers une conception optimale d’instruments à vent évolutive à destination des facteurs

Chabassier, Juliette, and Tournemenne, Robin

In CFA 2018 - 14ème Congrès Français d’Acoustique Apr 2018

URL