Fiche de NAJNUDEL Judy

Titre : Power-Balanced Modeling of Nonlinear Electronic Components and Circuits for Audio Effects
Date : 1 juillet 2022
Heure: 14:30
Résumé : This work is concerned with the modeling of nonlinear components and circuits for simulations in audio applications. Our goal is to propose models that are sufficiently sophisticated for simulations to sound realistic, but that remain simple enough for real time to be attainable. To this end, we explore two different approaches, both based on a port-Hamiltonian systems formulation. The first approach is comparable to "white box" modeling. It assumes that the circuit topology is known, and focuses on the modeling of specific components found in vintage audio circuits. The second approach is comparable to "grey box" modeling. It aims to retrieve the circuit topology and laws from measurements. The learning of the circuit topology is informed by a port-Hamiltonian formulation, and nonlinearities are addressed through kernel-based methods. Finally, a possible generalization of this approach for complex circuits is outlined through the introduction of the Koopman operator.
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