Chapter 19Nonlinear Processing: Distortion, Tube Simulation, and HF Exciters
There are several families of audio processing algorithms that use nonlinear processing as part of their effect. These include the following.
- solid state distortion, overdrive and fuzz emulators
- vacuum tube amplifier simulation
- simulations of analog filters that are designed with transistors or other nonlinear devices (e.g. Moog or Korg35 low-pass filters)
- high frequency “exciters” and enhancers
- ring modulation (linear processing with nonlinear output)
One way to approach nonlinear processing is to look at the input and output time domain transfer function. This is sometimes called the voltage transfer function (VTF) and involves the input and output relationship of ...
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