From 57045df5fe3ec557e57dc7434ac1a07b5521bffc Mon Sep 17 00:00:00 2001
From: Guenter  Geiger <ggeiger@users.sourceforge.net>
Date: Mon, 29 Jul 2002 17:06:19 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r58, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/; revision=59
---
 pd/doc/5.reference/biquad~.pd | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 pd/doc/5.reference/biquad~.pd

(limited to 'pd/doc/5.reference/biquad~.pd')

diff --git a/pd/doc/5.reference/biquad~.pd b/pd/doc/5.reference/biquad~.pd
new file mode 100644
index 00000000..81a31960
--- /dev/null
+++ b/pd/doc/5.reference/biquad~.pd
@@ -0,0 +1,35 @@
+#N canvas 185 22 655 349 12;
+#X obj 27 14 biquad~;
+#X msg 448 11 \; pd dsp 1;
+#X msg 448 55 \; pd dsp 0;
+#X obj 84 248 env~;
+#X floatatom 84 275;
+#X floatatom 15 110;
+#X obj 15 246 env~;
+#X floatatom 15 274;
+#X text 13 297 Compare the value of the straight signal on the left with the value of the filtered signal on the right.;
+#X obj 84 215 biquad~ 1.41407 -0.9998 1 -1.41421 1;
+#X msg 101 121 1.41407 -0.9998 1 -1.41421 1;
+#X text 76 31 calculates the following difference equation:;
+#X text 77 44 y(n) = ff1 * w(n) + ff2 * w(n-1) + ff3 * w(n-2);
+#X text 76 58 w(n) = x(n) + fb1 * w(n-1) + fb2 * w(n-2);
+#X text 18 76 Syntax: biquad~ fb1 fb2 ff1 ff2 ff3;
+#X text 341 213 this biquad~ is a notch filter for fn = Pi/4;
+#X text 390 226 (= SR/8 = 5512.5 Hz @44.1k);
+#X text 91 14 2-pole-2-zero-filter;
+#X text 113 99 list sets filter parameters;
+#X msg 119 161 set 0 0;
+#X msg 120 186 clear;
+#X obj 15 170 osc~ 5512.5;
+#X text 422 337 updated for Pd version-0.30;
+#X text 189 163 set internal state;
+#X text 187 185 ... or just clear it;
+#X connect 3 0 4 0;
+#X connect 5 0 21 0;
+#X connect 6 0 7 0;
+#X connect 9 0 3 0;
+#X connect 10 0 9 0;
+#X connect 19 0 9 0;
+#X connect 20 0 9 0;
+#X connect 21 0 6 0;
+#X connect 21 0 9 0;
-- 
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