Simulating an Asymmetrically Saturated Nonlinearity Using an LNLNL Cascade

Submitted by keunsup on Thu, 12/13/2012 - 7:31am

Title	Simulating an Asymmetrically Saturated Nonlinearity Using an LNLNL Cascade
Publication Type	Conference Paper
Year of Publication	2012
Authors	Lee, K. S., and J. S. Abel
Conference Name	133rd Audio Engineering Society Convention
Date Published	10/2012
Conference Location	San Francisco, CA, USA
Abstract	The modeling of a weakly nonlinear system having an asymmetric saturating nonlinearity is considered, and a computationally efficient model is proposed. The nonlinear model is the cascade of linear filters and memoryless nonlinearities, an LNLNL system. The two nonlinearities are upward and downward saturators, limiting, respectively, the amplitude of their input for either positive or negative excursions. In this way, distortion noted in each half an input sinusoid can be separately controlled. This simple model is applied toy simulating the signal chain of the Echoplex EP-4 tape delay, where informal listening tests showed excellent agreement between recorded and simulated program material.
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Simulating an Asymmetrically Saturated Nonlinearity Using an LNLNL Cascade

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