Phasing with 2nd-Order Allpass Filters

Phasing with 2nd-Order Allpass Filters

The allpass structure proposed in [405] 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.

**Figure 3.14:** Structure of a phaser based on four allpass filters AP1 through AP4.
$\begin{figure}\input fig/allpassphaser.pstex_t \end{figure}$

Subsections

Allpass Phaser Architecture
Allpass Phaser Parameters
Allpass Phaser Notch Distribution

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``Physical Audio Signal Processing for Virtual Musical Instruments and Digital Audio Effects'', by Julius O. Smith III, (December 2005 Edition).
Copyright © 2006-07-01 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA), Stanford University
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