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First-Order Allpass Filter

Transfer function:

$\displaystyle H_1(z) = S_1(z) \mathrel{\stackrel{\mathrm{\Delta}}{=}}\frac{k_1+z^{-1}}{1+k_1z^{-1}}
$

\epsfig{file=eps/apone.eps,width=0.8\textwidth }

(a)
Direct form II filter structure
(b)
Two-multiply lattice-filter structure


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Download Delay.pdf
Download Delay_2up.pdf
Download Delay_4up.pdf

``Computational Acoustic Modeling with Digital Delay'', by Julius O. Smith III, (From Lecture Overheads, Music 420).
Copyright © 2015-04-29 by Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),   Stanford University
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