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diff --git a/src/mdaLeslie.h b/src/mdaLeslie.h
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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/>.
+*/
+
+#ifndef __mdaLeslie_H
+#define __mdaLeslie_H
+
+#include "audioeffectx.h"
+
+#define NPARAMS  9      //number of parameters
+#define NPROGS   3      //number of programs
+
+class mdaLeslieProgram
+{
+public:
+	mdaLeslieProgram();
+private:
+	friend class mdaLeslie;
+    float param[NPARAMS];
+	char name[24];
+};
+
+class mdaLeslie : public AudioEffectX
+{
+public:
+	mdaLeslie(audioMasterCallback audioMaster);
+	~mdaLeslie();
+
+	virtual void process(float **inputs, float **outputs, int32_t sampleFrames);
+	virtual void processReplacing(float **inputs, float **outputs, int32_t sampleFrames);
+	virtual void setProgram(int32_t program);
+	virtual void setProgramName(char *name);
+	virtual void getProgramName(char *name);
+	virtual bool getProgramNameIndexed (int32_t category, int32_t index, char* name);
+	virtual void setParameter(int32_t index, float value);
+	virtual float getParameter(int32_t index);
+	virtual void getParameterLabel(int32_t index, char *label);
+	virtual void getParameterDisplay(int32_t index, char *text);
+	virtual void getParameterName(int32_t index, char *text);
+	virtual void suspend();
+
+	virtual bool getEffectName(char *name);
+	virtual bool getVendorString(char *text);
+	virtual bool getProductString(char *text);
+	virtual int32_t getVendorVersion() { return 1000; }
+
+protected:
+    void update();
+	mdaLeslieProgram *programs;
+
+  float filo; //crossover filter coeff
+  float fbuf1, fbuf2; //filter buffers
+  float twopi; //speed, target, momentum, phase, width, ampmod, freqmod...
+  float hspd, hset, hmom, hphi, hwid, hlev, hdep;
+  float lspd, lset, lmom, lphi, lwid, llev, gain;
+  float *hbuf;  //HF delay buffer
+	int32_t size, hpos; //buffer length & pointer
+
+  float chp, dchp, clp, dclp, shp, dshp, slp, dslp;
+};
+
+#endif