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SP1LimiterJS
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2007-05-05
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1KB
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39 lines
// (C) 2006, Michael Gruhn.
// NO WARRANTY IS GRANTED. THIS PLUG-IN IS PROVIDED ON AN "AS IS" BASIS, WITHOUT
// WARRANTY OF ANY KIND. NO LIABILITY IS GRANTED, INCLUDING, BUT NOT LIMITED TO,
// ANY DIRECT OR INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGE ARISING
// OUT OF THE USE OR INABILITY TO USE THIS PLUG-IN, COMPUTER FAILTURE OF
// MALFUNCTION INCLUDED. THE USE OF THE SOURCE CODE, EITHER PARTIALLY OR IN
// TOTAL, IS ONLY GRANTED, IF USED IN THE SENSE OF THE AUTHOR'S INTENTION, AND
// USED WITH ACKNOWLEDGEMENT OF THE AUTHOR. FURTHERMORE IS THIS PLUG-IN A THIRD
// PARTY CONTRIBUTION, EVEN IF INCLUDED IN REAPER(TM), COCKOS INCORPORATED OR
// ITS AFFILIATES HAVE NOTHING TO DO WITH IT. LAST BUT NOT LEAST, BY USING THIS
// PLUG-IN YOU RELINQUISH YOUR CLAIM TO SUE IT'S AUTHOR, AS WELL AS THE CLAIM TO
// ENTRUST SOMEBODY ELSE WITH DOING SO.
desc:Simple Peak-1 Limiter
slider1:-0<-20,0,.1>Treshold (dB)
slider2:0,REDUCTION (dB)
@init
gain = 1; c = 8.65617025; dc = 10^(-30);
@slider
thresh = exp(slider1/c); seekgain = 1;
gain = 1;
t = 0;
b = -exp(-62.83185307 / srate );
a = 1.0 + b;
@sample
rms = max( abs(spl0) , abs(spl1) );
rms = max( sqrt( (t = a*rms-b*t+dc)-dc) , rms);
(rms > thresh) ? gain = rms : gain = thresh;
spl0 /= gain;
spl1 /= gain;
slider2 = log(thresh/gain)*c;
sliderchange(2);