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/usr/lib/pd/extra/cyclone/rampsmooth~-help.pd is in pd-cyclone 0.2~beta3-2.

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#X text 0 19 LICENSE SIBSD;
#X text 0 95 LIBRARY cyclone;
#X text 0 76 OUTLET_0 signal;
#X text 0 0 KEYWORDS signal ramp smooth;
#X text 0 38 DESCRIPTION smooth out an incoming signal via a ramp;
#X text 0 57 INLET_0 signal ramp rampup rampdown;
#X text 0 116 VERSION 0.2-beta1;
#X text 0 134 AUTHOR Krzysztof Czaja;
#X text 1 152 RELEASE_DATE 2002;
#X text 2 171 WEBSITE http://suita.chopin.edu.pl/~czaja/miXed/externs/cyclone.html
;
#X text 2 203 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 smooth out an incoming signal via a ramp;
#X text 111 392 signal;
#X text 231 392 - incoming signal to smooth out;
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#X text 38 43 rampsmooth~ smooths an incoming signal across n samples.
Each time an incoming value changes \, it begins a linear ramp of n
samples to reach this value. Useful for envelope following and lowpass
filtering. The number of samples is specified either as arguments or
with the ramp \, rampup \, rampdown messages.;
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