| Abstract | | The Volterra Series provides a way to analyze a general nonlinear system [1]. The results of the analysis are
an infinite set of parameters, which completely describe the nonlinear system under certain smoothness and
stability restrictions. In fact, similarly to the Fourier series, a finite number of coefficients may be used as an
approximate analysis. Unfortunately, the guitar effects systems we want to analyze often contain nonlinear functions that
are hard to approximate because their derivative may not even be continuous. For example, a hard clipping
function, such as an operational amplifier driven past the power supply rails, would require very many
Volterra Series coefficients to be represented properly. This suggests that the Volterra Series is not well
suited for this application.
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