Simulation of an Ondes Martenot Circuit

Najnudel, Judy; Hélie, Thomas; Roze, David; Boutin, Henri

doi:10.1109/taslp.2020.3019643

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…In the longer term, the obtained results could be used to reconstruct the sound [11] by numerical sound synthesis [12], constructing a facsimile, or active control of contemporary loudspeakers, in order to preserve the sound heritage of this musical instrument.…”

Section: Contributionmentioning

confidence: 99%

A physical model for the electromagnetic loudspeaker used in early ondes Martenot diffuseurs

Wijnand,

Boutin,

Jossic

et al. 2024

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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The ondes Martenot is an electric musical instrument that was presented for the first time in Paris in 1928. An electrical waveform is generated by a heterodyne oscillator whose fundamental frequency is controlled by modifying the oscillator capacitance/inductance using a ribbon/keyboard. A drawer enables the performer to filter the wave and to specify the volume and articulation. The resulting wave is fed to one or multiple diffuseurs, that convert it into soundwaves. The first diffuseurs used a so-called electromagnetic (or movingiron) loudspeaker, that was combined around 1937 with an electrodynamic (or moving-coil) loudspeaker, which is the standard technology today. The behaviour of a less known electromagnetic loudspeaker from 1937 is studied with the longer term goal to preserve the sound heritage of an instrument whose conservation state does not allow for musical practice. The loudspeaker consists of a permanent magnet and two electromagnets whose combined flux lets a metal reed vibrate. A rod connects the moving reed to the apex of a paper cone, that generates the resulting soundwave. In the current paper, a minimal physical model for this electromagnetic loudspeaker is derived. It is shown that its operating principle is inherently nonlinear, as opposed to the linear Thiele & Small model for electrodynamic loudspeakers. Furthermore, a first experimental measurement on a heritage diffuseur enables to quantify the nonlinearities presented by the electromagnetic loudspeaker.

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Section: Contributionmentioning

confidence: 99%

A physical model for the electromagnetic loudspeaker used in early ondes Martenot diffuseurs

Wijnand,

Boutin,

Jossic

et al. 2024

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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“…The generation is achieved discretizing Eq. ( 2), and performing a standard Newton-Raphson iteration at each sample (a detailed numerical scheme can be found in [46]). Finally, some noise (SNR from 38 to 98 dB, with a normal distribution) is added to the data to test the robustness of the identification method.…”

Section: Circuit Parameters and Data Generationmentioning

confidence: 99%

Identification of Nonlinear Circuits as Port-Hamiltonian Systems

Najnudel

Müller

Hélie

et al. 2021

2021 24th International Conference on Digital Audio Effects (DAFx)

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This paper addresses identification of nonlinear circuits for power-balanced virtual analog modeling and simulation. The proposed method combines a port-Hamiltonian system formulation with kernel-based methods to retrieve model laws from measurements. This combination allows for the estimated model to retain physical properties that are crucial for the accuracy of simulations, while representing a variety of nonlinear behaviors. As an illustration, the method is used to identify a nonlinear passive peaking EQ.

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“…The importance of ensuring the longevity of DMI's and the compositions which employ them is widely understood and appreciated, as are the obstacles which may need to be overcome in order to do so [6][7][8][9][10] [11]. Emulations have certainly played their part in this, usually when the technology used by specific composers in specific pieces has become obsolete or inaccessible [12][13][14][15] [16]. The need for performers of DMI's to learn and practise new kinds of skills is also well recognized [17][18].…”

Section: Contextmentioning

confidence: 99%

SoftMRP: a Software Emulation of the Magnetic Resonator Piano

Pitkin

Nime 2021

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The Magnetic Resonator Piano (MRP) is a relatively well-established DMI which significantly expands the capabilities of the acoustic piano. This paper presents SoftMRP, a Max/MSP patch designed to emulate the physical MRP and thereby to allow rehearsal of MRP repertoire and performance techniques using any MIDI keyboard and expression pedal; it is hoped that the development of such a tool will encourage even more widespread adoption of the original instrument amongst composers and performers. This paper explains SoftMRP's features and limitations, discussing the challenges of approximating responses which rely upon the MRP's continuous sensing of key position, and considering ways in which the development of the emulation might feed back into the development of the original instrument, both specifically and more broadly: since it was designed by a composer, based on his experience of writing for the instrument, it offers the MRP's designers an insight into how the instrument is conceptualised and understood by the musicians who use it.

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Simulation of an Ondes Martenot Circuit

Cited by 3 publications

References 35 publications

A physical model for the electromagnetic loudspeaker used in early ondes Martenot diffuseurs

A physical model for the electromagnetic loudspeaker used in early ondes Martenot diffuseurs

Identification of Nonlinear Circuits as Port-Hamiltonian Systems

SoftMRP: a Software Emulation of the Magnetic Resonator Piano

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