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/usr/lib/pd/extra/cyclone/pow~-help.pd is in pd-cyclone 0.2~beta1-2.

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#X text 0 19 LICENSE SIBSD;
#X text 0 114 LIBRARY cyclone;
#X text 0 95 OUTLET_0 signal;
#X text 0 76 INLET_1 flaot signal;
#X text 0 0 KEYWORDS signal power exponent base;
#X text 0 38 DESCRIPTION take base to the exponent power using signals
;
#X text 0 57 INLET_0 signal;
#X text 0 134 VERSION 0.2-beta1;
#X text 0 152 AUTHOR Krzysztof Czaja;
#X text 1 170 RELEASE_DATE 2002;
#X text 2 189 WEBSITE http://suita.chopin.edu.pl/~czaja/miXed/externs/cyclone.html
;
#X text 2 221 HELP_PATCH_AUTHORS Christoph Kummerer. Revised by Jonathan
Wilkes for Pd-extended 0.42 to conform to the PDDP template. Alex Cleveland
updated this patch for Pd-l2ork version 2013.05.28. Fred Jan Kraan
adapted the patch to pd-extended 2015-02-02;
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#X text 12 23 Take base to the exponent power using signals;
#X text 108 473 signal;
#X text 182 473 - signal to take to exponent power;
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#X text 108 500 float;
#X text 108 519 signal;
#X text 182 509 - base of power function;
#X text 108 556 signal;
#X text 182 556 - output of power function;
#X text 90 595 1) float;
#X text 182 595 - set intial power (default 0);
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#X msg 314 107 -7 \, 1 1500 -1 1500 -7 300;
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#X msg 32 102 -1 \, 1 3000;
#X text 44 331 result goes from 220 to 880 Hz;
#X text 104 103 pitch glissando;
#X text 54 60 click to hear something;
#X text 115 638 pow~ is useful for generating curves from line~. In
the example above \, pow~ with an argument 2 (for 2 to the exponent
specified by the input signal) is used to generate a pitch glissando.
;
#X text 345 232 base can be a signal or float;
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#X text 124 205 optional argument determines;
#X text 124 218 the base of the power function.;
#X text 125 230 Default is 0;
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#X text 296 74 amplitude envelope. 2 to the -7 doesn't;
#X text 296 86 completely shut off the signal...;
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