Flanger Feedback Control

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Index: Physical Audio Signal Processing

Physical Audio Signal Processing

Flanging

Flanger Inverted Mode

Summary of Flanging

A Schroeder allpass filter can be obtained by replacing the unit-delay with a delay-line of arbitrary length in a first-order allpass filter. — Click for https://ccrma.stanford.edu/~jos/pasp/Allpass_Filters.html

The feedforward comb filter is made by forming a linear combination of the input and output of a delay line. — Click for https://ccrma.stanford.edu/~jos/pasp/Feedforward_Comb_Filters.html

A feedback comb filter is made from a delay line by scaling its output signal by some coefficient and summing that with the delay-line input signal. — Click for https://ccrma.stanford.edu/~jos/pasp/Feedback_Comb_Filters.html

A delay line is used to delay a signal in time. Delay lines for digital signals are typically implemented in software using a circular buffer. — Click for https://ccrma.stanford.edu/~jos/pasp/Delay_Lines.html

Feedback control is the discipline in which system dynamics are studied and altered by creating feedback loops. — Click for http://en.wikipedia.org/wiki/Control_engineering

The flanger digital audio effect is implemented using a time-varying delay line and summing its input and output, creating moving interference notches. — Click for https://ccrma.stanford.edu/~jos/pasp/Flanging.html#6405

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Index: Physical Audio Signal Processing

Physical Audio Signal Processing

Flanging

Flanger Inverted Mode

Summary of Flanging

Flanger Feedback Control

Many modern commercial flangers have a control knob labeled ``feedback'' or ``regen.'' This control sets the level of feedback from the output to the input of the delay line, thereby creating a feedback comb filter in addition to the feedforward comb filter, in the same manner as in the creation of a Schroeder allpass filter in §2.8.1 (see Fig.2.30).

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``Physical Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2010, ISBN 978-0-9745607-2-4
Copyright © 2024-06-28 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA), Stanford University

Flanger Feedback Control

``Physical Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2010, ISBN 978-0-9745607-2-4 Copyright © 2024-06-28 by Julius O. Smith III Center for Computer Research in Music and Acoustics (CCRMA), Stanford University

``Physical Audio Signal Processing'', by Julius O. Smith III, W3K Publishing, 2010, ISBN 978-0-9745607-2-4
Copyright © 2024-06-28 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA), Stanford University