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- // Copyright 2006, Thomas Scott Stillwell
- // All rights reserved.
- //
- //Redistribution and use in source and binary forms, with or without modification, are permitted
- //provided that the following conditions are met:
- //
- //Redistributions of source code must retain the above copyright notice, this list of conditions
- //and the following disclaimer.
- //
- //Redistributions in binary form must reproduce the above copyright notice, this list of conditions
- //and the following disclaimer in the documentation and/or other materials provided with the distribution.
-
-
- //
- //The name of Thomas Scott Stillwell may not be used to endorse or
- //promote products derived from this software without specific prior written permission.
-
-
- //
-
-
- //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
- //IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- //FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
- //BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- //(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- //PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- //STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- //THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- desc:prog. dependent comp. with saturation
-
- slider1:0<-60,0,0.1>Threshold (dB)
- slider2:1<1,20,0.1>Ratio
- slider3:0<0,1,1{No,Yes}>Auto-makeup
- slider4:0<-20,20,0.1>Manual gain
-
- @init
- i=0;
- loop(
- 120,
- attimes[i] = ((0.08924 / i) + (0.60755 / (i ^ 2)) - 0.00006)*srate;
- i+=1;
- );
- overthresh = 0;
- compressing = 0;
- relfactor = 2 ^ (-20.833333333 / srate);
- attime=0;
- atctr=0;
- prevmax=0;
- maxover=0;
- relctr=0;
- cratio=0;
- ratio=0;
-
- @slider
- thresh = slider1;
- threshv = 2^(thresh/6);
- ratio = slider2;
- cratio = ratio;
- autogain = slider3;
- makeup = autogain ? (((abs(thresh) - (abs(thresh) / ratio))/2) + slider4) : slider4;
- makeupv = 2^(makeup / 6);
-
- @sample
- aspl0 = abs(spl0);
- aspl1 = abs(spl1);
- maxspl = max(aspl0,aspl1);
- maxspl > threshv ? (
- overthresh = 1;
- overdb = log(6 * maxspl / threshv) / log(2);
- overdb > maxover ? (
- maxover = overdb;
- prevattime = attime;
- attime = attimes[floor(overdb+0.5)];
- prevattime > 0 ? (atctr += prevattime - attime);
- atctr = min(atctr,attime);
- reltime = srate * overdb / 125;
- relctr = 0;
- cratio = ratio;
- );
- relctr = 0;
- releasing = 0;
- atctr == 0 ? atctr = attimes[floor(overdb)];
- );
- overthresh ? (
- atctr += 1;
- atctr >= attime ? (
- compressing = 1;
- relctr = 0;
- );
- );
- compressing ? (
- overthresh = 0;
- atctr = 0;
- thresh0 = threshv * sign(spl0);
- thresh1 = threshv * sign(spl1);
- spl0 = (aspl0 <= threshv ? spl0 : (thresh0 + (spl0-thresh0) / cratio));
- spl1 = (aspl1 <= threshv ? spl1 : (thresh1 + (spl1-thresh1) / cratio));
- );
- maxspl <= threshv ? (
- relctr += 1;
- releasing = 1;
- relctr >= (reltime - 1000) ? (
- compressing = 0;
- overthresh = 0;
- relctr = 0;
- reltime = 0;
- atctr = 0;
- attime = 0;
- releasing = 0;
- cratio = ratio;
- );
- );
- releasing ? (
- cratio = max(1,cratio * relfactor);
- );
- spl0 = spl0 * makeupv;
- spl1 = spl1 * makeupv;
-