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#X text 12 125 LIBRARY internal;
#X text 12 165 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 145 AUTHOR Miller Puckette;
#X text 12 205 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 real one-zero (non-recursive) filter \, raw
;
#X text 12 65 INLET_0 signal clear set;
#X text 12 85 INLET_1 float signal;
#X text 12 105 OUTLET_0 signal;
#X text 12 185 RELEASE_DATE 1997;
#X restore 500 597 pd META;
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#X text 98 423 float;
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pdpedia: rzero~;
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#X msg 214 166 set 1;
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#X text 11 23 real one-zero (non-recursive) filter \, raw;
#X text 98 357 signal;
#X text 168 357 - the incoming signal to filter.;
#X text 74 52 [rzero~] filters an audio signal (left inlet) via a one-zero
real filter \, whose coefficient is controlled by a creation argument
or by an audio signal (right inlet).;
#X text 98 377 clear;
#X text 168 377 - clear internal state to zero.;
#X text 98 397 set;
#X text 168 397 - set internal state (e.g. \, "set 1").;
#X text 167 423 - filter coefficient.;
#X text 167 438 - filter coefficient.;
#X text 98 438 signal;
#X text 80 521 1) float;
#X text 167 521 - (optional) initializes the filter coefficient.;
#X text 98 473 signal;
#X text 168 473 - the outgoing \, filtered signal.;
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#X text 80 18 Stuff to test it:;
#X obj 76 168 rzero~;
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#X text 201 60 real;
#X text 200 81 complex;
#X text 22 44 1-pole;
#X text 71 44 1-zero;
#X text 121 44 1-zero \, reversed;
#X text 47 29 summary of raw filters:;
#X text 18 184 User-friendly Filters;
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#X text 18 250 Other Objects;
#X text 18 113 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 7 1 [rzero~] Related Objects;
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#X text 74 290 where y[n] is the output \, x[n] the input \, and a[n]
the filter coefficient. The filter is always stable.;
#X text 74 320 The transfer function is H(Z) = 1 - aZ^-1.;
#X text 128 269 y[n] = x[n] - a[n] * x[n-1];
#X text 74 249 The action of [rzero~] is:;
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doc/3.audio.examples/H11.shelving.pd;
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