This paper deals with the real-time simulation of a multi-stage guitar preamplifier. Dynamic triode models based on Norman Koren’s model, and "secondary phenomena" as grid rectification effect and parasitic capacitances are considered. Then, the circuit is modeled by a nonlinear differential algebraic system, with extended state-space representations. Standard numerical schemes yield efficient stable simulations of the circuit, and are implemented as VST plug-ins. Measures of real triodes have been realized, to develop new triode models, and to characterize the capabilities of aged and new triodes. The results are compared for all the models, using lookup tables generated with the measures, and Norman Koren’s model with its parameters estimated from the measures.

Authors: Cohen, Ivan; Hélie, Thomas
Affiliations: Ircam, Paris, France; Orosys R&D, Montpellier, France(See document for exact affiliation information.)
AES Convention: 129 (November 2010) Paper Number: 8219
Publication Date: November 4, 2010 Import into BibTeX
Subject: Acoustical and Physical Modeling
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=15641

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