References of "Schmitz, Thomas"
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See detailA new toolbox for the identification of diagonal Volterra kernels allowing the emulation of nonlinear audio devices
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

in Schmitz, Thomas (Ed.) International Congress on Acoustics : ICA, Argentine 5-9 Septembre 2016 (2016, September 10)

Numerous audio systems are nonlinear. It is thus of great importance to study them and understand how they work. Volterra series model and its subclass (cascade Hammerstein-Wiener model) are usual ways to ... [more ▼]

Numerous audio systems are nonlinear. It is thus of great importance to study them and understand how they work. Volterra series model and its subclass (cascade Hammerstein-Wiener model) are usual ways to modelize nonlinear systems. However the identification methods of these models are still considered as an open topic. Therefore we have developed a new optimized identification tool ready for use and presented as a Matlab toolbox. This toolbox provides the parameters of the optimized sine sweep needed for the identification method, it is able to calculate the parameters of the Hammerstein model and to emulate the output signal of a nonlinear device for a given input signal. To evaluate the toolbox, we modelize a guitar distortion effect (the Tubescreamer) having a total harmonic distortion (THD) comprised in the range 10-23\%. We report a mean error of less than 0.7\% between the emulated signal and the signal coming from the distortion effect. [less ▲]

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See detailEmulate an analog nonlinear audio device, is it possible ?
Schmitz, Thomas ULiege

Conference (2016, January 25)

Non linear audio device emulation by means of Hammerstein model identification by sine sweep technique

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See detailImprovement in non-linear guitar loudspeaker sound reproduction
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

in International Conference on Systems, Signals and Image Processing (2014, May)

This paper proposes a study of the accuracy of a guitar amplifier loudspeaker simulation. The simulation is based on a non-linear convolution of a signal using Volterra kernels, which are measured in ... [more ▼]

This paper proposes a study of the accuracy of a guitar amplifier loudspeaker simulation. The simulation is based on a non-linear convolution of a signal using Volterra kernels, which are measured in anechoic conditions with a sine-sweep technique. In this paper, we propose an evaluation of the method to minimise the cost in CPU load, while keeping the best performance in the sound reproduction. To assess the performance of the method, we measure errors between the simulated and real sounds. Human listening tests are moreover proposed in order to determine the minimum level of accuracy leading to unaudible differences with the real loudspeaker.. [less ▲]

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See detailModeling and analysis of nonlinear systems applied to a guitar chain signal
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

Conference (2014, February 21)

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See detailNonlinear guitar loudspeaker simulation
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

in Proceedings of the AES 134 th convention (2013, May)

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See detailNon-linear loudspeaker simulation. Guitar loudspeaker.
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

Conference (2012, June 06)

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