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#X text 12 185 LIBRARY internal;
#X text 12 225 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 205 AUTHOR Miller Puckette;
#X text 12 265 HELP_PATCH_AUTHORS Updated for Pd version-0.38. Jonathan
Wilkes revised the patch to conform to the PDDP template for Pd version
0.42.;
#X text 12 5 KEYWORDS signal filter;
#X text 12 45 DESCRIPTION complex one-zero (non-recursive) filter \,
raw;
#X text 12 65 INLET_0 signal clear set;
#X text 12 85 INLET_1 signal;
#X text 12 105 INLET_2 signal;
#X text 12 125 INLET_3 signal;
#X text 12 145 OUTLET_0 signal;
#X text 12 165 OUTLET_1 signal;
#X text 12 245 RELEASE_DATE 1997;
#X restore 500 597 pd META;
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#X text 202 61 real;
#X text 201 82 complex;
#X text 23 45 1-pole;
#X text 72 45 1-zero;
#X text 122 45 1-zero \, reversed;
#X text 48 30 summary of raw filters:;
#X text 22 185 User-friendly Filters;
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#X text 22 251 Other Objects;
#X text 22 114 Pd also provides a suite of user-friendly filters. This
and other raw filters are provided for situations which the user-friendly
ones can't handle. See Chapter 8 of http://crca.ucsd.edu/~msp/techniques
for an introduction to the necessary theory.;
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#X text 8 2 [czero~] Related Objects;
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#X text 98 297 signal;
#X text 98 434 signal;
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#X text 150 13 Stuff to test it:;
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#X restore 102 552 pd test;
#X text 98 312 clear;
#X text 98 327 set;
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#X text 98 459 signal;
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#X msg 50 136 clear;
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#X msg 57 162 set 0.6 0.8;
#X obj 41 252 czero~ 0.9 0.4;
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#X obj 450 20 pddp/pddplink http://wiki.puredata.info/en/czero~ -text
pdpedia: czero~;
#X text 179 152 The action of czero~ is:;
#X text 238 173 y[n] = x[n] - a[n] * x[n-1];
#X text 176 193 where y[n] is the output \, x[n] the input \, and a[n]
the filter coefficient (all complex numbers). The filter is always
stable.;
#X text 175 248 The transfer function is H(Z) = 1 - aZ^-1.;
#X text 11 23 complex one-zero (non-recursive) filter \, raw;
#X text 168 297 - signal to filter (real part).;
#X text 168 312 - clear internal state to zero.;
#X text 168 327 - set internal state (real & imaginary parts).;
#X text 168 347 - signal to filter ( imaginary part ).;
#X text 168 372 - filter coefficient ( real part ).;
#X text 168 397 - filter coefficient ( imaginary part ).;
#X text 167 506 - (optional) filter coefficient (real part).;
#X text 167 521 - (optional) filter coefficient (imaginary part).;
#X text 80 506 1) float;
#X text 80 521 2) float;
#X text 84 53 [czero~] filters a complex audio signal (first two inlets)
via a one-zero filter \, whose coefficients are controlled by creation
arguments or by another complex audio signal (remaining two inlets).
;
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