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#X floatatom 118 172 0 0 0 0 - - -;
#X obj 54 85 osc~ 100;
#X msg 69 117 clear;
#X obj 77 483 lop~;
#X text 8 483 see also:;
#X obj 52 7 rpole~;
#X text 114 7 real one-pole (recursive) filter \, raw;
#X text 8 35 Rpole~ filters an audio signal (left inlet) via a one-pole
real filter \, whose coefficient is controlled by a creation argument
or by an audio signal (right inlet).;
#X text 331 482 updated for Pd version-0.38;
#X obj 84 430 rzero~;
#X obj 35 450 cpole~;
#X obj 35 430 rpole~;
#X obj 133 430 rzero_rev~;
#X obj 84 450 czero~;
#X obj 133 450 czero_rev~;
#X text 211 430 real;
#X text 210 451 complex;
#X text 32 414 1-pole;
#X text 81 414 1-zero;
#X text 131 414 1-zero \, reversed;
#X text 57 399 summary of raw filters:;
#X msg 71 143 set 1;
#X text 117 143 <-- set internal state;
#X text 118 86 <-- signal to filter;
#X text 142 173 <-- filter coefficient (may be a signal);
#X text 129 198 <-- creation argument initializes filter coefficient
;
#X text 73 252 y[n] = y[n-1] + a[n] * x[n];
#X text 10 302 The transfer function is H(Z) = 1/(1 - aZ^-1).;
#X text 113 116 <-- clear internal state to zero;
#X text 8 270 where y[n] is the output \, x[n] the input \, and a[n]
the filter coefficient. The filter is unstable if/when |a[n]|>1.;
#X obj 53 195 rpole~ 0.9;
#X text 14 230 The action of rpole~ is:;
#N canvas 393 91 326 287 test 0;
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#X floatatom 77 243 5 0 0 0 - - -;
#X obj 76 168 rpole~;
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#X obj 76 105 *~;
#X msg 97 137 set 1;
#X floatatom 172 157 4 -100 100 0 - - -;
#X obj 172 182 / 100;
#X obj 214 256 dac~;
#X obj 228 177 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0
1;
#X obj 214 220 *~;
#X obj 230 197 / 10;
#X text 80 18 Stuff to test it:;
#X connect 0 0 6 0;
#X connect 1 0 0 0;
#X connect 2 0 3 0;
#X connect 4 0 2 0;
#X connect 4 0 12 0;
#X connect 5 0 6 1;
#X connect 6 0 4 0;
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#X connect 11 0 13 0;
#X connect 12 0 10 0;
#X connect 12 0 10 1;
#X connect 13 0 12 1;
#X restore 457 416 pd test;
#X text 111 483 etc.: user-friendly filters;
#X text 8 320 (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.);
#X connect 0 0 30 1;
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