Although semiconductor technologies have displaced vacuum-tube devices in nearly all
fields of electronics, vacuum tubes are still widely used in professional guitar amplifiers. A …

Digital sound synthesis has long been approached using standard digital filtering
techniques. Newer synthesis strategies, however, make use of physical descriptions of …

Vacuum tube amplifiers present sonic characteristics frequently coveted by musicians, that
are often due to the distinct nonlinearities of their circuits, and accurately modelling such …

Virtual analog modeling of audio effects consists of emulating the sound of an audio
processor reference device. This digital simulation is normally done by designing …

In the context of music production, distortion effects are mainly used for aesthetic reasons
and are usually applied to electric musical instruments. Most existing methods for nonlinear …

We present a lightweight method of reverse engineering distortion effects using Wiener-
Hammerstein models implemented in a differentiable framework. The Wiener-Hammerstein …

The multiple-variance method is a cross-correlation method that exploits input signals with
different powers for the identification of a nonlinear system by means of the Volterra series. It …

Volterra series are known to be efficient to represent weakly nonlinear systems and the first
distortions. Their truncated versions allow one to derive realizations (in the sense of system …

Background Analog guitar effects, whether based upon vacuum tubes or solid-state devices,
consist of circuits that are accurately described in the audio frequency band by nonlinear …

The diode clipper circuit with an embedded low-pass filter lies at the heart of both diode
clip** “Distortion” and “Overdrive” or “Tube Screamer” effects pedals. An accurate …