diff --git a/dexed-test.sh b/dexed-test.sh
new file mode 100755
index 0000000..e230076
--- /dev/null
+++ b/dexed-test.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+export LV2_PATH="/usr/local/lib/lv2"
+jackd --silent -r -d dummy &
+mod-host -i <<ENDOFDATA
+add https://github.com/dcoredump/dexed.lv2 0
+add http://gareus.org/oss/lv2/stepseq#s8n8 1
+connect effect_1:midiout effect_0:midi_in
+connect effect_0:lv2_audio_out_1 system:playback_1
+connect effect_0:lv2_audio_out_1 system:playback_2
+param_set 1 grid_1_1 1
+param_set 1 grid_2_3 1
+ENDOFDADA
diff --git a/dexed.txt b/dexed.txt
deleted file mode 100644
index aa75242..0000000
--- a/dexed.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-PluginParam.cpp: 340 DexedAudioProcessor::initCtrl() {
-
-    CtrlDX(String name, int steps, int offset = -1, int displayValue = 0);
-
-    fxCutoff = new CtrlFloat("Cutoff", &fx.uiCutoff);
-    fxReso = new CtrlFloat("Resonance", &fx.uiReso);
-    output = new CtrlFloat("Output", &fx.uiGain);
-    tune = new CtrlTune("MASTER TUNE ADJ", this);
-
-    algo = new CtrlDX("ALGORITHM", 31, 134, 1);
-    feedback = new CtrlDX("FEEDBACK", 7, 135);
-    oscSync = new CtrlDX("OSC KEY SYNC", 1, 136);
-    lfoRate = new CtrlDX("LFO SPEED", 99, 137);
-    lfoDelay = new CtrlDX("LFO DELAY", 99, 138);
-    lfoPitchDepth = new CtrlDX("LFO PM DEPTH", 99, 139);
-    lfoAmpDepth = new CtrlDX("LFO AM DEPTH", 99, 140);
-    lfoSync = new CtrlDX("LFO KEY SYNC", 1, 141);
-    lfoWaveform = new CtrlDXLabel("LFO WAVE", 5, 142, lbl);
-    transpose = new CtrlDXTranspose("MIDDLE C", 48, 144);
-    pitchModSens = new CtrlDX("P MODE SENS.", 7, 143);
-
-    0..5
-    pitchEgRate[i] = new CtrlDX(rate, 99, 126+i);
-    pitchEgLevel[i] = new CtrlDX(level, 99, 130+i);
-    opCtrl[opVal].egRate[j] = new CtrlDX(opRate, 99, opTarget + j);
-    opCtrl[opVal].egLevel[j] = new CtrlDX(opLevel, 99, opTarget + j + 4);
-    opCtrl[opVal].level = new CtrlDX(opVol, 99, opTarget + 16);
-    opCtrl[opVal].opMode = new CtrlDX(opMode, 1, opTarget + 17);
-    opCtrl[opVal].coarse = new CtrlDX(coarse, 31, opTarget + 18);
-    opCtrl[opVal].fine = new CtrlDX(fine, 99, opTarget + 19);
-    opCtrl[opVal].detune = new CtrlDX(detune, 14, opTarget + 20, -7);
-    opCtrl[opVal].sclBrkPt = new CtrlDX(sclBrkPt, 99, opTarget + 8);
-    opCtrl[opVal].sclLeftDepth = new CtrlDX(sclLeftDepth, 99, opTarget + 9);
-    opCtrl[opVal].sclRightDepth = new CtrlDX(sclRightDepth, 99, opTarget + 10);
-    opCtrl[opVal].sclLeftCurve = new CtrlDXLabel(sclLeftCurve, 3, opTarget + 11, keyScaleLabels);
-    opCtrl[opVal].sclRightCurve = new CtrlDXLabel(sclRightCurve, 3, opTarget + 12, keyScaleLabels);
-    opCtrl[opVal].sclRate = new CtrlDX(sclRate, 7, opTarget + 13);
-    opCtrl[opVal].ampModSens = new CtrlDX(ampModSens, 3, opTarget + 14);
-    opCtrl[opVal].velModSens = new CtrlDX(velModSens, 7, opTarget + 15);
-    opCtrl[opVal].opSwitch = new CtrlOpSwitch(opSwitchLabel, (char *)&(controllers.opSwitch)+(5-i));
-
-
-
-
diff --git a/src/Dexed.h b/src/Dexed.h
index 7ab629b..1d3d059 100644
--- a/src/Dexed.h
+++ b/src/Dexed.h
@@ -21,16 +21,6 @@
 #ifndef DEXED_H_INCLUDED
 #define DEXED_H_INCLUDED
 
-void dexed_trace(const char *source, const char *fmt, ...);
-
 #define DEXED_ID "0.9.2"
 
-#ifdef DEBUG
-    #define DEXED_VERSION DEXED_ID " DEBUG"
-    #define TRACE(fmt, ...) dexed_trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
-#else
-    #define DEXED_VERSION DEXED_ID
-    #define TRACE(fmt, ...)
-#endif
-
 #endif  // DEXED_H_INCLUDED
diff --git a/src/Makefile b/src/Makefile
index a2d575e..da46e8a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,16 +1,16 @@
-#DEBUG=-DDEBUG=1 -DMSFADEBUG=1
-#DEBUG=-DMSFADEBUG=1
+DEBUG=-DDEBUG=1
 BUNDLE=dexed.lv2
-INSTALL_DIR=/home/pi/zynthian/zynthian-plugins/mod-lv2
+#INSTALL_DIR=/home/pi/zynthian/zynthian-plugins/mod-lv2
+INSTALL_DIR=/usr/local/lib/lv2
 TARGET=dexed.so
-OBJ=ringbuffer.o fm_core.o env.o lfo.o dx7note.o sin.o pitchenv.o fm_op_kernel.o freqlut.o exp2.o EngineMkI.o EngineOpl.o PluginFx.o
+OBJ=ringbuffer.o fm_core.o env.o lfo.o dx7note.o sin.o pitchenv.o fm_op_kernel.o freqlut.o exp2.o EngineMkI.o EngineOpl.o PluginFx.o trace.o
 CFLAGS=-fPIC -DPIC $(DEBUG) -std=c++11 -I. -I/usr/local/include/lvtk-2
 LDFLAGS=-L/usr/local/lib -llvtk_plugin2
 
 all: $(BUNDLE) Makefile
 
 clean:
-	rm -f *.o *~ *.bak *.gch dexed.peg *.so
+	rm -f *.o *~ *.bak *.gch dexed.peg *.so *.gch msfa/*.gch
 	rm -rf $(BUNDLE)
 
 install: $(BUNDLE)
@@ -37,6 +37,9 @@ dexed.so: $(OBJ) dexed.o
 dexed.o: dexed.cpp dexed.peg
 	$(CXX) $(CFLAGS) -Wall -c dexed.cpp
 
+trace.o: trace.c trace.h
+	$(CXX) $(CFLAGS) -Wall -c trace.c
+
 ringbuffer.o: msfa/ringbuffer.cc
 	$(CXX) $(CFLAGS) -Wall -c msfa/ringbuffer.cc
  
diff --git a/src/dexed.cpp b/src/dexed.cpp
index 0d728d8..70d3628 100644
--- a/src/dexed.cpp
+++ b/src/dexed.cpp
@@ -561,6 +561,34 @@ void Dexed::onParam(int param_num,int param_val)
 	data[param_num]=param_val;
 }
 
+int Dexed::getEngineType() {
+    return engineType;
+}
+
+void Dexed::setEngineType(int tp) {
+    TRACE("settings engine %d", tp);
+    
+    switch (tp)  {
+        case DEXED_ENGINE_MARKI:
+            controllers.core = &engineMkI;
+            feedback_bitdepth = 11;
+            break;
+        case DEXED_ENGINE_OPL:
+            controllers.core = &engineOpl;
+            feedback_bitdepth = 11;
+            break;
+        default:
+            controllers.core = &engineMsfa;
+            feedback_bitdepth = 8;
+            break;
+    }
+    engineType = tp;
+}
+
+void Dexed::setMonoMode(bool mode) {
+    monoMode = mode;
+}
+
 //==============================================================================
 
 DexedVoice::DexedVoice(double rate) : m_key(lvtk::INVALID_KEY), m_rate(rate)
@@ -604,15 +632,4 @@ unsigned char DexedVoice::get_key(void) const
   TRACE("Bye");
 }
 
-#ifdef DEBUG
-void dexed_trace(const char *source, const char *fmt, ...) {
-    char output[4096];
-    va_list argptr;
-    va_start(argptr, fmt);
-    vsnprintf(output, 4095, fmt, argptr);
-    va_end(argptr);
-    printf("%s: %s\n",source,output);
-}
-#endif
-
 static int _ = Dexed::register_class(p_uri);
diff --git a/src/dexed.h b/src/dexed.h
index eb07c9d..81942f9 100644
--- a/src/dexed.h
+++ b/src/dexed.h
@@ -31,6 +31,9 @@
 #include "EngineMkI.h"
 #include "EngineOpl.h"
 #include "dexed.peg"
+#ifdef DEBUG
+#include "trace.h"
+#endif
 
 struct ProcessorVoice {
     int midi_note;
@@ -46,12 +49,6 @@ enum DexedEngineResolution {
     DEXED_ENGINE_OPL
 };
 
-#ifdef DEBUG
-    #define TRACE(fmt, ...) _trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
-#else
-    #define TRACE(fmt, ...)
-#endif
-
 // GLOBALS
 //static const float scaler = 0.00003051757813;
 static const float scaler = 0.00003;
@@ -84,6 +81,7 @@ class Dexed : public lvtk::Synth<DexedVoice, Dexed>
     void run(uint32_t sample_count);
     int getEngineType();
     void setEngineType(int rs);
+    void setMonoMode(bool mode);
     void set_params(void);
     void GetSamples(int n_samples, int16_t *buffer);
     //bool isMonoMode();
diff --git a/src/manifest.ttl b/src/manifest.ttl
index c9053cc..9bb1bc0 100644
--- a/src/manifest.ttl
+++ b/src/manifest.ttl
@@ -6,7 +6,7 @@
 @prefix pset: <http://lv2plug.in/ns/ext/presets#> .
 @prefix doap: <http://usefulinc.com/ns/doap#> .
 
-<https://github.com/dcoredump/dexed>
+<https://github.com/dcoredump/dexed.lv2>
     a lv2:Plugin ;
     doap:name "Dexed";
     rdfs:seeAlso <Dexed.ttl> .
diff --git a/src/msfa/aligned_buf.h.gch b/src/msfa/aligned_buf.h.gch
deleted file mode 100644
index 72d76c3..0000000
Binary files a/src/msfa/aligned_buf.h.gch and /dev/null differ
diff --git a/src/msfa/controllers.h b/src/msfa/controllers.h
index 6f5f719..cae40bd 100755
--- a/src/msfa/controllers.h
+++ b/src/msfa/controllers.h
@@ -18,10 +18,13 @@
 #define __CONTROLLERS_H
 
 #include "synth.h"
-#include "../Dexed.h"
 #include <stdio.h>
 #include <string.h>
 
+#ifdef DEBUG
+#include "trace.h"
+#endif
+
 #ifdef _WIN32
 #define snprintf _snprintf
 #endif
diff --git a/src/msfa/controllers.h.gch b/src/msfa/controllers.h.gch
deleted file mode 100644
index 9b2f1e5..0000000
Binary files a/src/msfa/controllers.h.gch and /dev/null differ
diff --git a/src/msfa/dx7note.h.gch b/src/msfa/dx7note.h.gch
deleted file mode 100644
index f82241f..0000000
Binary files a/src/msfa/dx7note.h.gch and /dev/null differ
diff --git a/src/msfa/env.h.gch b/src/msfa/env.h.gch
deleted file mode 100644
index b45c996..0000000
Binary files a/src/msfa/env.h.gch and /dev/null differ
diff --git a/src/msfa/exp2.h.gch b/src/msfa/exp2.h.gch
deleted file mode 100644
index 2be0fb7..0000000
Binary files a/src/msfa/exp2.h.gch and /dev/null differ
diff --git a/src/msfa/fm_core.cc b/src/msfa/fm_core.cc
index 69deaef..a408c55 100644
--- a/src/msfa/fm_core.cc
+++ b/src/msfa/fm_core.cc
@@ -23,7 +23,6 @@
 #include "fm_op_kernel.h"
 #include "fm_core.h"
 
-
 //using namespace std;
 
 const FmAlgorithm FmCore::algorithms[32] = {
diff --git a/src/msfa/fm_core.h.gch b/src/msfa/fm_core.h.gch
deleted file mode 100644
index fc26759..0000000
Binary files a/src/msfa/fm_core.h.gch and /dev/null differ
diff --git a/src/msfa/fm_op_kernel.h.gch b/src/msfa/fm_op_kernel.h.gch
deleted file mode 100644
index 6276620..0000000
Binary files a/src/msfa/fm_op_kernel.h.gch and /dev/null differ
diff --git a/src/msfa/freqlut.h.gch b/src/msfa/freqlut.h.gch
deleted file mode 100644
index 3d4a24f..0000000
Binary files a/src/msfa/freqlut.h.gch and /dev/null differ
diff --git a/src/msfa/lfo.h.gch b/src/msfa/lfo.h.gch
deleted file mode 100644
index c1d26a7..0000000
Binary files a/src/msfa/lfo.h.gch and /dev/null differ
diff --git a/src/msfa/module.h.gch b/src/msfa/module.h.gch
deleted file mode 100644
index 956385f..0000000
Binary files a/src/msfa/module.h.gch and /dev/null differ
diff --git a/src/msfa/pitchenv.h.gch b/src/msfa/pitchenv.h.gch
deleted file mode 100644
index ac0fee7..0000000
Binary files a/src/msfa/pitchenv.h.gch and /dev/null differ
diff --git a/src/msfa/sin.h.gch b/src/msfa/sin.h.gch
deleted file mode 100644
index 86a736a..0000000
Binary files a/src/msfa/sin.h.gch and /dev/null differ
diff --git a/src/msfa/synth.h b/src/msfa/synth.h
index 9593e60..fe0e349 100644
--- a/src/msfa/synth.h
+++ b/src/msfa/synth.h
@@ -17,16 +17,6 @@
 #ifndef __SYNTH_H
 #define __SYNTH_H
 
-#define DEXED_ID "0.9.2"
-
-#ifdef DEBUG
-    #define DEXED_VERSION DEXED_ID " DEBUG"
-    #define TRACE(fmt, ...) dexed_trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
-#else
-    #define DEXED_VERSION DEXED_ID
-    #define TRACE(fmt, ...)
-#endif
-
 // This IS not be present on MSVC.
 // See http://stackoverflow.com/questions/126279/c99-stdint-h-header-and-ms-visual-studio
 #include <stdint.h>
@@ -68,8 +58,6 @@ inline static T max(const T& a, const T& b) {
 }
 
 
-void dexed_trace(const char *source, const char *fmt, ...);
-
 #define QER(n,b) ( ((float)n)/(1<<b) )
 
 #endif  // __SYNTH_H
diff --git a/src/msfa/synth.h.gch b/src/msfa/synth.h.gch
deleted file mode 100644
index 208ebe0..0000000
Binary files a/src/msfa/synth.h.gch and /dev/null differ
diff --git a/src/trace.c b/src/trace.c
new file mode 100644
index 0000000..5998d7c
--- /dev/null
+++ b/src/trace.c
@@ -0,0 +1,12 @@
+#ifdef DEBUG
+#include <stdio.h>
+#include <stdarg.h>
+void _trace(const char *source, const char *fmt, ...) {
+    char output[4096];
+    va_list argptr;
+    va_start(argptr, fmt);
+    vsnprintf(output, 4095, fmt, argptr);
+    va_end(argptr);
+    printf("%s: %s\n",source,output);
+}
+#endif
diff --git a/src/trace.h b/src/trace.h
new file mode 100644
index 0000000..adc5b6b
--- /dev/null
+++ b/src/trace.h
@@ -0,0 +1,11 @@
+#ifndef TRACE_H_INCLUDED
+#define TRACE_H_INCLUDED
+
+#ifdef DEBUG
+    extern void _trace(const char *source, const char *fmt, ...);
+    #define TRACE(fmt, ...) _trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
+#else
+    #define TRACE(fmt, ...)
+#endif
+
+#endif