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206 lines
7.1 KiB
C++
Executable file
206 lines
7.1 KiB
C++
Executable file
/* ========================================
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* Channel5 - Channel5.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Channel5_H
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#include "Channel5.h"
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#endif
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void Channel5::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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const double localiirAmount = iirAmount / overallscale;
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const double localthreshold = threshold / overallscale;
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const double density = pow(drive,2); //this doesn't relate to the plugins Density and Drive much
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fpFlip)
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{
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iirSampleLA = (iirSampleLA * (1 - localiirAmount)) + (inputSampleL * localiirAmount);
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inputSampleL = inputSampleL - iirSampleLA;
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iirSampleRA = (iirSampleRA * (1 - localiirAmount)) + (inputSampleR * localiirAmount);
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inputSampleR = inputSampleR - iirSampleRA;
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}
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else
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{
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iirSampleLB = (iirSampleLB * (1 - localiirAmount)) + (inputSampleL * localiirAmount);
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inputSampleL = inputSampleL - iirSampleLB;
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iirSampleRB = (iirSampleRB * (1 - localiirAmount)) + (inputSampleR * localiirAmount);
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inputSampleR = inputSampleR - iirSampleRB;
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}
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//highpass section
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double bridgerectifier = fabs(inputSampleL)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-density))+(bridgerectifier*density);
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else inputSampleL = (inputSampleL*(1-density))-(bridgerectifier*density);
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bridgerectifier = fabs(inputSampleR)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-density))+(bridgerectifier*density);
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else inputSampleR = (inputSampleR*(1-density))-(bridgerectifier*density);
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//drive section
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double clamp = inputSampleL - lastSampleL;
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if (clamp > localthreshold)
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inputSampleL = lastSampleL + localthreshold;
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if (-clamp > localthreshold)
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inputSampleL = lastSampleL - localthreshold;
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lastSampleL = inputSampleL;
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clamp = inputSampleR - lastSampleR;
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if (clamp > localthreshold)
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inputSampleR = lastSampleR + localthreshold;
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if (-clamp > localthreshold)
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inputSampleR = lastSampleR - localthreshold;
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lastSampleR = inputSampleR;
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//slew section
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fpFlip = !fpFlip;
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if (output < 1.0) {
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inputSampleL *= output;
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inputSampleR *= output;
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}
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//noise shaping to 32-bit floating point
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float fpTemp = inputSampleL;
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fpNShapeL += (inputSampleL-fpTemp);
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inputSampleL += fpNShapeL;
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//if this confuses you look at the wordlength for fpTemp :)
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fpTemp = inputSampleR;
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fpNShapeR += (inputSampleR-fpTemp);
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inputSampleR += fpNShapeR;
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//for deeper space and warmth, we try a non-oscillating noise shaping
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//that is kind of ruthless: it will forever retain the rounding errors
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//except we'll dial it back a hair at the end of every buffer processed
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//end noise shaping on 32 bit output
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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fpNShapeL *= 0.999999;
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fpNShapeR *= 0.999999;
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//we will just delicately dial back the FP noise shaping, not even every sample
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//this is a good place to put subtle 'no runaway' calculations, though bear in mind
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//that it will be called more often when you use shorter sample buffers in the DAW.
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//So, very low latency operation will call these calculations more often.
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}
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void Channel5::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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const double localiirAmount = iirAmount / overallscale;
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const double localthreshold = threshold / overallscale;
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const double density = pow(drive,2); //this doesn't relate to the plugins Density and Drive much
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fpFlip)
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{
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iirSampleLA = (iirSampleLA * (1 - localiirAmount)) + (inputSampleL * localiirAmount);
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inputSampleL = inputSampleL - iirSampleLA;
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iirSampleRA = (iirSampleRA * (1 - localiirAmount)) + (inputSampleR * localiirAmount);
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inputSampleR = inputSampleR - iirSampleRA;
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}
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else
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{
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iirSampleLB = (iirSampleLB * (1 - localiirAmount)) + (inputSampleL * localiirAmount);
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inputSampleL = inputSampleL - iirSampleLB;
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iirSampleRB = (iirSampleRB * (1 - localiirAmount)) + (inputSampleR * localiirAmount);
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inputSampleR = inputSampleR - iirSampleRB;
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}
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//highpass section
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double bridgerectifier = fabs(inputSampleL)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-density))+(bridgerectifier*density);
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else inputSampleL = (inputSampleL*(1-density))-(bridgerectifier*density);
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bridgerectifier = fabs(inputSampleR)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-density))+(bridgerectifier*density);
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else inputSampleR = (inputSampleR*(1-density))-(bridgerectifier*density);
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//drive section
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double clamp = inputSampleL - lastSampleL;
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if (clamp > localthreshold)
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inputSampleL = lastSampleL + localthreshold;
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if (-clamp > localthreshold)
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inputSampleL = lastSampleL - localthreshold;
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lastSampleL = inputSampleL;
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clamp = inputSampleR - lastSampleR;
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if (clamp > localthreshold)
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inputSampleR = lastSampleR + localthreshold;
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if (-clamp > localthreshold)
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inputSampleR = lastSampleR - localthreshold;
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lastSampleR = inputSampleR;
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//slew section
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fpFlip = !fpFlip;
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if (output < 1.0) {
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inputSampleL *= output;
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inputSampleR *= output;
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}
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//noise shaping to 64-bit floating point
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double fpTemp = inputSampleL;
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fpNShapeL += (inputSampleL-fpTemp);
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inputSampleL += fpNShapeL;
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//if this confuses you look at the wordlength for fpTemp :)
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fpTemp = inputSampleR;
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fpNShapeR += (inputSampleR-fpTemp);
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inputSampleR += fpNShapeR;
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//for deeper space and warmth, we try a non-oscillating noise shaping
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//that is kind of ruthless: it will forever retain the rounding errors
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//except we'll dial it back a hair at the end of every buffer processed
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//end noise shaping on 64 bit output
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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fpNShapeL *= 0.999999;
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fpNShapeR *= 0.999999;
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//we will just delicately dial back the FP noise shaping, not even every sample
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//this is a good place to put subtle 'no runaway' calculations, though bear in mind
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//that it will be called more often when you use shorter sample buffers in the DAW.
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//So, very low latency operation will call these calculations more often.
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}
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