Phasing with 2nd-Order Allpass Filters

The allpass structure proposed in [438] provides a convenient means for generating nonuniformly spaced notches that are independently controllable to a high degree. Another advantage of the allpass approach is that no interpolating delay line is needed.

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Subsections

• Allpass Phaser Architecture
• Allpass Phaser Parameters
• Allpass Phaser Notch Distribution

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written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.