Virtual Analog Example: Phasing

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Index: Physical Audio Signal Processing

Physical Audio Signal Processing

Transfer Function Models

Body Factoring Example

Phasing with First-Order Allpass Filters

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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

Spectrum analysis of sound is analogous to decomposing white light into its component colors by means of a prism — Click for https://ccrma.stanford.edu/~jos/mdft/Example_Applications_DFT.html

A signal is typically a real-valued function of time. A discrete-time signal is typically a real-valued function of discrete time, and is therefore a time-ordered sequence of real numbers. — Click for http://ccrma.stanford.edu/~jos/filters/Definition_Signal.html

A phase shifter or phaser is an audio effect device which operates by sweeping notches through the spectrum of a sound — Click for http://www.geofex.com/Article_Folders/phasers/phase.html

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Index: Physical Audio Signal Processing

Physical Audio Signal Processing

Transfer Function Models

Body Factoring Example

Phasing with First-Order Allpass Filters

Virtual Analog Example: Phasing

As mentioned in §5.4, the phaser, or phase shifter works by sweeping notches through a signal's short-time spectrum. The notches are classically spaced nonuniformly, while flangers employ uniformly spaced notches (§5.3). In this section, we look at using a chain of allpass filters to implement the phasing effect.

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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

Virtual Analog Example: Phasing

``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