Abstract / Description of output
This paper presents an application of the port Hamiltonian formalism to the nonlinear simulation of the OTA-based Korg35 filter circuit and the Moog 4-pole ladder filter circuit. Lyapunov analysis is used with their state-space representations to guarantee zero-input stability over the range of parameters consistent with the actual circuits. A zero-input stable non-iterative discrete-time scheme based on a discrete gradient and a change of state variables is shown along with numerical simulations. Simulations show behavior consistent with the actual operation of the circuits, e.g.,self-oscillation, and are found to be stable and have lower computational cost compared to iterative methods.
Original language | English |
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Title of host publication | Proceedings of the International Conference on Digital Audio Effects |
Place of Publication | Vienna, Austria |
Number of pages | 8 |
Publication status | Published - 29 Jun 2021 |