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/usr/lib/pd/extra/cyclone/tanh~-help.pd is in pd-cyclone 0.1~alpha55-3.

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#N canvas 1443 211 694 400 10;
#X declare -lib cyclone;
#X obj 510 185 +~ 11;
#X obj 505 158 *~ 10;
#X obj 505 134 cycle~ 0.5;
#X obj 425 134 cycle~ 110;
#X floatatom 39 92 0 0 0 0 - - -;
#X obj 18 115 *~ 1;
#X text 22 338 outputs signal values always between -1 and 1;
#X obj 439 205 *~ 1;
#X obj 439 273 *~ 0.1;
#X obj 18 71 cycle~ 2;
#X obj 150 110 -~ 3.14159;
#X obj 150 87 *~ 6.28319;
#X obj 150 65 phasor~ 2;
#X obj 439 310 dac~;
#X text 477 242 outputs soft clipped signal;
#X text 15 11 Hyperbolic tangent function (tanh(x)) for signals;
#X text 11 33 turn a sine wave into a square wave by cranking up the
volume!;
#X text 327 95 can be used to simulate analog distortion \, and is
much "smoother" than using clip~;
#X obj 437 13 import cyclone;
#X obj 439 238 tanh~;
#X obj 18 175 Scope~ 130 130 256 3 128 -1 1 0 0 0 0 102 255 51 135
135 135 0;
#X obj 154 175 Scope~ 130 130 256 3 128 -1 1 0 0 0 0 102 255 51 135
135 135 0;
#X obj 150 141 tanh~;
#X obj 18 139 tanh~;
#X connect 0 0 7 1;
#X connect 1 0 0 0;
#X connect 2 0 1 0;
#X connect 3 0 7 0;
#X connect 4 0 5 1;
#X connect 5 0 23 0;
#X connect 7 0 19 0;
#X connect 8 0 13 0;
#X connect 8 0 13 1;
#X connect 9 0 5 0;
#X connect 10 0 22 0;
#X connect 11 0 10 0;
#X connect 12 0 11 0;
#X connect 19 0 8 0;
#X connect 22 0 21 0;
#X connect 23 0 20 0;