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On the use of Volterra series for real-time simulations of weakly nonlinear analog audio devices: application to the Moog ladder filter

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On the use of Volterra series for real-time simulations of weakly nonlinear analog audio devices: application to the Moog ladder filter
 

Nom(s)

Helie, Thomas (auteur)
 

Publication

Montréal, Québec , 2006
 

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Résumé

In this paper, we show how the formalism of the Volterra series can be used to represent the nonlinear Moog ladder filter. The analog circuit is analyzed to produce a set of governing differential equations. The Volterra kernels of this system are solved from simple algebraic equations. They define an exact decomposition of the system. An identification procedure leads to structures composed of linear filters, sums and instantaneous products of signals. Finally, a discrete-time realization of the truncated series, which guarantees no aliasing, is performed.
 

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Contribution au colloque ou congrès : DAFx - International Conference On Digital Audio Effects
 

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Date de la notice

2010-02-25 01:00:00
 

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