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Open Access

Real-Time Guitar Preamp Simulation Using Modified Blockwise Method and Approximations

EURASIP Journal on Advances in Signal Processing20112011:629309

https://doi.org/10.1155/2011/629309

Received: 14 September 2010

Accepted: 27 January 2011

Published: 22 February 2011

Abstract

The designing of algorithms for real-time digital simulation of analog effects and amplifiers brings two contradictory requirements: accuracy versus computational efficiency. In this paper, the simulation of a typical guitar tube preamp using an approximation of the solution of differential equations is discussed with regard to accuracy and computational complexity. The solution of circuit equations is precomputed and stored in N-D tables. The stored values are approximated, and therefore different approximation techniques are investigated as well. The approximated functions are used for output signal computation and also for circuit state update. The designed algorithm is compared to the numerical solution of the given preamp and also to the real preamp.

Keywords

Differential EquationInformation TechnologyComputational ComplexityOutput SignalQuantum Information

Publisher note

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Authors’ Affiliations

(1)
Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic

Copyright

© J.Macak and J. Schimmel. 2011

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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