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#X text 12 135 LIBRARY internal;
#X text 12 175 WEBSITE http://crca.ucsd.edu/~msp/;
#X text 12 25 LICENSE SIBSD;
#X text 12 155 AUTHOR Miller Puckette;
#X text 12 215 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) "reverse" filter
\, raw;
#X text 12 75 INLET_0 signal clear set;
#X text 12 95 INLET_1 float signal;
#X text 12 115 OUTLET_0 signal;
#X text 12 195 RELEASE_DATE 1997;
#X restore 500 597 pd META;
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#X text 98 418 float;
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-text pdpedia: rzero_rev~;
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#X text 11 23 real one-zero (non-recursive) "reverse" filter \, raw
;
#X text 98 343 signal;
#X text 98 363 clear;
#X text 98 393 set;
#X text 168 363 - clear internal state to zero.;
#X text 168 343 - the incoming signal to be filtered.;
#X text 168 393 - set internal state.;
#X text 167 418 - filter coefficient.;
#X text 167 438 - filter coefficient.;
#X text 98 473 signal;
#X text 168 473 - the outgoing \, filtered signal.;
#X text 80 520 1) float;
#X text 167 520 - (optional) initializes the filter coefficient.;
#X text 69 49 [rzero_rev~] 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). The impulse response
is that of "rzero" reversed in time.;
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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 80 18 Stuff to test it:;
#X obj 76 168 rzero_rev~;
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#X text 70 281 where y[n] is the output \, x[n] the input \, and a[n]
the filter coefficient. The filter is always stable.;
#X text 126 261 y[n] = -a[n] * x[n] + x[n-1];
#X text 70 312 The transfer function is H(Z) = -a + Z^-1.;
#X text 69 240 The action of [rzero_rev~] is:;
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doc/3.audio.examples/H14.all.pass.pd;
#X text 98 438 signal;
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