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diff --git a/src/mdaThruZero.cpp b/src/mdaThruZero.cpp
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+/*
+ Copyright 2008-2011 David Robillard <http://drobilla.net>
+ Copyright 1999-2000 Paul Kellett (Maxim Digital Audio)
+
+ This is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ This software is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this software. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "mdaThruZero.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <float.h>
+#include <math.h>
+
+AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
+{
+ return new mdaThruZero(audioMaster);
+}
+
+mdaThruZeroProgram::mdaThruZeroProgram() ///default program settings
+{
+ param[0] = 0.30f; //rate
+ param[1] = 0.43f; //depth
+ param[2] = 0.47f; //mix
+ param[3] = 0.30f; //feedback
+ param[4] = 1.00f; //minimum delay to stop LF buildup with feedback
+ strcpy(name, "Thru-Zero Flanger");
+}
+
+
+mdaThruZero::mdaThruZero(audioMasterCallback audioMaster): AudioEffectX(audioMaster, NPROGS, NPARAMS)
+{
+ setNumInputs(2);
+ setNumOutputs(2);
+ setUniqueID("mdaThruZero"); ///identify plug-in here
+ DECLARE_LVZ_DEPRECATED(canMono) ();
+ canProcessReplacing();
+
+ programs = new mdaThruZeroProgram[NPROGS]; ///////////////TODO: programs
+ setProgram(0);
+
+ ///differences from default program...
+ programs[1].param[0] = 0.50f;
+ programs[1].param[1] = 0.20f;
+ programs[1].param[2] = 0.47f;
+ strcpy(programs[1].name,"Phase Canceller");
+ programs[2].param[0] = 0.60f;
+ programs[2].param[1] = 0.60f;
+ programs[2].param[2] = 0.35f;
+ programs[2].param[4] = 0.70f;
+ strcpy(programs[2].name,"Chorus Doubler");
+ programs[3].param[0] = 0.75f;
+ programs[3].param[1] = 1.00f;
+ programs[3].param[2] = 0.50f;
+ programs[3].param[3] = 0.75f;
+ programs[3].param[4] = 1.00f;
+ strcpy(programs[3].name,"Mad Modulator");
+
+
+
+ ///initialise...
+ bufpos = 0;
+ buffer = new float[BUFMAX];
+ buffer2 = new float[BUFMAX];
+ phi = fb = fb1 = fb2 = deps = 0.0f;
+
+ suspend();
+}
+
+bool mdaThruZero::getProductString(char* text) { strcpy(text, "MDA ThruZero"); return true; }
+bool mdaThruZero::getVendorString(char* text) { strcpy(text, "mda"); return true; }
+bool mdaThruZero::getEffectName(char* name) { strcpy(name, "ThruZero"); return true; }
+
+void mdaThruZero::resume() ///update internal parameters...
+{
+ float * param = programs[curProgram].param;
+ rat = (float)(pow(10.0f, 3.f * param[0] - 2.f) * 2.f / getSampleRate());
+ dep = 2000.0f * param[1] * param[1];
+ dem = dep - dep * param[4];
+ dep -= dem;
+
+ wet = param[2];
+ dry = 1.f - wet;
+ if(param[0]<0.01f) { rat=0.0f; phi=(float)0.0f; }
+ fb = 1.9f * param[3] - 0.95f;
+}
+
+
+void mdaThruZero::suspend() ///clear any buffers...
+{
+ if(buffer) memset(buffer , 0, BUFMAX * sizeof(float));
+ if(buffer2) memset(buffer2, 0, BUFMAX * sizeof(float));
+}//^^^being cautious as was crashing in AudioMulch when unloaded
+
+
+mdaThruZero::~mdaThruZero() ///destroy any buffers...
+{
+ if(buffer) delete [] buffer;
+ if(buffer2) delete [] buffer2;
+ if(programs) delete[] programs;
+}
+
+
+void mdaThruZero::setProgram(int32_t program)
+{
+ curProgram = program;
+ resume();
+}
+
+
+void mdaThruZero::setParameter(int32_t index, float value)
+{
+ if(index==3) phi=0.0f; //reset cycle
+ programs[curProgram].param[index] = value;
+ resume();
+}
+
+
+float mdaThruZero::getParameter(int32_t index) { return programs[curProgram].param[index]; }
+void mdaThruZero::setProgramName(char *name) { strcpy(programs[curProgram].name, name); }
+void mdaThruZero::getProgramName(char *name) { strcpy(name, programs[curProgram].name); }
+bool mdaThruZero::getProgramNameIndexed (int32_t category, int32_t index, char* name)
+{
+ if ((unsigned int)index < NPROGS)
+ {
+ strcpy(name, programs[index].name);
+ return true;
+ }
+ return false;
+}
+
+void mdaThruZero::getParameterName(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "Rate"); break;
+ case 1: strcpy(label, "Depth"); break;
+ case 2: strcpy(label, "Mix"); break;
+ case 4: strcpy(label, "DepthMod"); break;
+ default: strcpy(label, "Feedback");
+ }
+}
+
+
+void mdaThruZero::getParameterDisplay(int32_t index, char *text)
+{
+ char string[16];
+ float * param = programs[curProgram].param;
+
+ switch(index)
+ {
+ case 0: if(param[0]<0.01f) strcpy (string, "-");
+ else sprintf(string, "%.2f", (float)pow(10.0f ,2.0f - 3.0f * param[index]));
+ break;
+ case 1: sprintf(string, "%.2f", 1000.f * dep / getSampleRate()); break;
+ case 3: sprintf(string, "%.0f", 200.0f * param[index] - 100.0f); break;
+ default: sprintf(string, "%.0f", 100.0f * param[index]);
+ }
+ string[8] = 0;
+ strcpy(text, (char *)string);
+}
+
+
+void mdaThruZero::getParameterLabel(int32_t index, char *label)
+{
+ switch(index)
+ {
+ case 0: strcpy(label, "sec"); break;
+ case 1: strcpy(label, "ms"); break;
+ default: strcpy(label, "%");
+ }
+}
+
+
+void mdaThruZero::process(float **inputs, float **outputs, int32_t sampleFrames)
+{
+ float *in1 = inputs[0];
+ float *in2 = inputs[1];
+ float *out1 = outputs[0];
+ float *out2 = outputs[1];
+ float a, b, c, d;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+ c = out1[1];
+ d = out2[1];
+
+ c += a; ///process here
+ d += b;
+
+ *++out1 = c;
+ *++out2 = d;
+ }
+}
+
+
+void mdaThruZero::processReplacing(float **inputs, float **outputs, int32_t sampleFrames)
+{
+ float *in1 = inputs[0];
+ float *in2 = inputs[1];
+ float *out1 = outputs[0];
+ float *out2 = outputs[1];
+ float a, b, f=fb, f1=fb1, f2=fb2, ph=phi;
+ float ra=rat, de=dep, we=wet, dr=dry, ds=deps, dm=dem;
+ int32_t tmp, tmpi, bp=bufpos;
+ float tmpf;
+
+ --in1;
+ --in2;
+ --out1;
+ --out2;
+ while(--sampleFrames >= 0)
+ {
+ a = *++in1;
+ b = *++in2;
+
+ ph += ra;
+ if(ph>1.0f) ph -= 2.0f;
+
+ bp--; bp &= 0x7FF;
+ *(buffer + bp) = a + f * f1;
+ *(buffer2 + bp) = b + f * f2;
+
+ //ds = 0.995f * (ds - de) + de; //smoothed depth change ...try inc not mult
+ tmpf = dm + de * (1.0f - ph * ph); //delay mod shape
+ tmp = int(tmpf);
+ tmpf -= tmp;
+ tmp = (tmp + bp) & 0x7FF;
+ tmpi = (tmp + 1) & 0x7FF;
+
+ f1 = *(buffer + tmp); //try adding a constant to reduce denormalling
+ f2 = *(buffer2 + tmp);
+ f1 = tmpf * (*(buffer + tmpi) - f1) + f1; //linear interpolation
+ f2 = tmpf * (*(buffer2 + tmpi) - f2) + f2;
+
+ a = a * dr - f1 * we;
+ b = b * dr - f2 * we;
+
+ *++out1 = a;
+ *++out2 = b;
+ }
+ if(fabs(f1)>1.0e-10) { fb1 = f1; fb2 = f2; } else fb1 = fb2 = 0.0f; //catch denormals
+ phi = ph;
+ deps = ds;
+ bufpos = bp;
+}
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