diff --git a/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate b/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate
index 53bf9c4..54b0a76 100644
Binary files a/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate and b/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/README.md b/README.md
index 3652a13..161c580 100644
--- a/README.md
+++ b/README.md
@@ -30,18 +30,15 @@ new version here but you see it in the change log, it's because this version is
 (current sprint). Only officials (tested) builds are listed here.
 
 * Version 0.6.1 [vst win32/x64](http://le-son666.com/software/dexed/dexed-0.6.1-win.zip) - [vst os x](http://le-son666.com/software/dexed/dexed-0.6.1-osx.vst.zip)
-* Version 0.6.0 [vst win32/x64](http://le-son666.com/software/dexed/dexed-0.6.0-win.zip) - [vst os x](http://le-son666.com/software/dexed/dexed-0.6.0-osx.vst.zip)
-* Version 0.5.1 [vst win32](http://le-son666.com/software/dexed/dexed-0.5.1-win32.zip) - [vst win64](http://le-son666.com/software/dexed/dexed-0.5.1-win64.zip) - [vst os x](http://le-son666.com/software/dexed/dexed-0.5.1-osx.vst.zip)
-* Version 0.5.0 [vst win32](http://le-son666.com/software/dexed/dexed-0.5.0a-win32.zip) - [vst win64](http://le-son666.com/software/dexed/dexed-0.5.0a-win64.zip) - [vst os x](http://le-son666.com/software/dexed/dexed-0.5.0-osx.vst.zip)
 
 Changelog
 ---------
 #### Version 0.7.0 (current sprint)
 * Preliminary Algo 4 & 6 feedback support
 * DX Engine 'Dirty DX' emulation
-* DX Engine LFO amplitude - still buggy
+* DX Engine LFO amplitude
 * Fixed stucked notes when programs where changed
-* Fixed engine envelop wrong timing if it was not 44100Khz - still buggy
+* Fixed engine envelop wrong timing if it was not 44100Khz
 
 #### Version 0.6.1
 * Mouse over + LFO type fix + pitch eg values
diff --git a/Source/Dexed.h b/Source/Dexed.h
index fa0a6d7..6325b12 100644
--- a/Source/Dexed.h
+++ b/Source/Dexed.h
@@ -24,14 +24,14 @@
 void dexed_trace(const char *source, const char *fmt, ...);
 
 #ifdef DEBUG
-    #define DEXED_VERSION "0.7.0 BETA DEBUG"
+    #define DEXED_VERSION "0.7.0a1 DEBUG"
     #ifdef _MSC_VER
         #define TRACE(fmt, ...) dexed_trace(__FUNCTION__,fmt,##__VA_ARGS__)
     #else
         #define TRACE(fmt, ...) dexed_trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
     #endif
 #else
-    #define DEXED_VERSION "0.7.0 BETA"
+    #define DEXED_VERSION "0.7.0a1"
     #define TRACE(fmt, ...)
 #endif
 
diff --git a/Source/PluginFx.h b/Source/PluginFx.h
index 6f02ca4..3c04d04 100644
--- a/Source/PluginFx.h
+++ b/Source/PluginFx.h
@@ -21,6 +21,15 @@
 #ifndef PLUGINFX_H_INCLUDED
 #define PLUGINFX_H_INCLUDED
 
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class ModuleFx {
+public:
+    virtual ~ModuleFx() {};
+    virtual void init(int sampleRate) = 0;
+    virtual void process(float *work, int sz) = 0;
+};
+
 class PluginFx {
 	float s1,s2,s3,s4;
 	float sampleRate;
@@ -55,6 +64,8 @@ class PluginFx {
     
 public:
     
+    ScopedPointer<ModuleFx> obxdFilter;
+    
     // this is set directly by the ui / parameter
     float uiCutoff;
     float uiReso;
diff --git a/Source/PluginParam.cpp b/Source/PluginParam.cpp
index 69263b5..a648795 100644
--- a/Source/PluginParam.cpp
+++ b/Source/PluginParam.cpp
@@ -141,15 +141,6 @@ float CtrlDX::getValueHost() {
 
 void CtrlDX::setValueHost(float f) {
     setValue((f * steps));
-    
-    /*
-    DexedAudioProcessorEditor *editor = (DexedAudioProcessorEditor *) parent->getActiveEditor();
-    if ( editor == NULL ) {
-        return;
-    }
-    String msg;
-    msg << label << " = " << getValueDisplay();
-    editor->global.setParamMessage(msg);*/
 }
 
 void CtrlDX::setValue(int v) {
diff --git a/Source/msfa/dx7note.cc b/Source/msfa/dx7note.cc
index b540073..46f725f 100644
--- a/Source/msfa/dx7note.cc
+++ b/Source/msfa/dx7note.cc
@@ -19,6 +19,7 @@
 using namespace std;
 #endif
 #include <math.h>
+#include <stdlib.h>
 #include "synth.h"
 #include "freqlut.h"
 #include "exp2.h"
@@ -126,8 +127,10 @@ static const uint8_t pitchmodsenstab[] = {
   0, 10, 20, 33, 55, 92, 153, 255
 };
 
-static const uint8_t ampmodsenstab[] = {
-    0, 66, 109, 255
+
+// 0, 66, 109, 255
+static const uint32_t ampmodsenstab[] = {
+    0, 4342338, 7171437, 16777216
 };
 
 void Dx7Note::init(const char patch[156], int midinote, int velocity) {
@@ -190,7 +193,7 @@ void Dx7Note::compute(int32_t *buf, int32_t lfo_val, int32_t lfo_delay,
   // TODO(PG) : make this integer friendly
   uint32_t pwmd = (ctrls->values_[kControllerModWheel] * 0.7874) * (1 << 24);
   int32_t senslfo = pitchmodsens_ * (lfo_val - (1 << 23));
-  uint32_t amd = ampmoddepth_ * lfo_delay;    // Q32 :D
+  uint32_t amd = ((int64_t)ampmoddepth_ * (int64_t)lfo_delay) >> 8;    // Q24 :D
     
   pitchmod += (((int64_t)pwmd) * (int64_t)senslfo) >> 39;
   pitchmod += (((int64_t)pmd) * (int64_t)senslfo) >> 39;
@@ -216,12 +219,13 @@ void Dx7Note::compute(int32_t *buf, int32_t lfo_val, int32_t lfo_delay,
     params_[op].freq = Freqlut::lookup(basepitch_[op] + pitchmod);
 
     int32_t level = env_[op].getsample();
-    if ( ampmodsens_[op] != 0 ) {
-      uint32_t sensamp =  ampmodsens_[op] * (lfo_val - (1 << 23));
-      uint32_t amd_level = (((int64_t)amd) * (int64_t)sensamp) >> 40;
-      level -= amd_level;
-    }
     int32_t gain = Exp2::lookup(level - (14 * (1 << 24)));
+      if ( ampmodsens_[op] != 0 ) {
+          uint32_t sensamp = ((int64_t)ampmodsens_[op]) * ((int64_t)gain) >> 24;
+          sensamp = ((int64_t)sensamp) * ((int64_t)lfo_val) >> 24;
+          uint32_t amd_level = (((int64_t)amd) * (int64_t)sensamp) >> 24;
+          gain -= amd_level;
+      }
     params_[op].gain[1] = gain;
   }
   core_.compute(buf, params_, algorithm_, fb_buf_, fb_shift_, ctrls);
@@ -249,6 +253,7 @@ void Dx7Note::update(const char patch[156], int midinote) {
   fb_shift_ = feedback != 0 ? 8 - feedback : 16;
   pitchmoddepth_ = (patch[139] * 165) >> 6;
   pitchmodsens_ = pitchmodsenstab[patch[143] & 7];
+  ampmoddepth_ = (patch[140] * 165) >> 6;
 }
 
 void Dx7Note::peekVoiceStatus(VoiceStatus &status) {
diff --git a/Source/msfa/env.cc b/Source/msfa/env.cc
index 96bbfba..50b4b6c 100755
--- a/Source/msfa/env.cc
+++ b/Source/msfa/env.cc
@@ -19,7 +19,7 @@
 #include "synth.h"
 #include "env.h"
 
-using namespace std;
+//using namespace std;
 
 uint32_t Env::sr_multiplier = (1<<24);
 
@@ -40,7 +40,7 @@ void Env::init(const int r[4], const int l[4], int32_t ol, int rate_scaling) {
 }
 
 int32_t Env::getsample() {
-  if (ix_ < 3 || (ix_ < 4) && !down_) {
+  if (ix_ < 3 || ((ix_ < 4) && !down_)) {
     if (rising_) {
       const int jumptarget = 1716;
       if (level_ < (jumptarget << 16)) {
diff --git a/Source/msfa/env.h b/Source/msfa/env.h
index 7161c5a..f1e2af8 100755
--- a/Source/msfa/env.h
+++ b/Source/msfa/env.h
@@ -47,7 +47,7 @@ class Env {
   static void init_sr(double sample_rate);
     
  private:
-  // This code is normalized to 44100, need to put a multiplier
+  // PG: This code is normalized to 44100, need to put a multiplier
   // if we are not using 44100.
   static uint32_t sr_multiplier;
     
diff --git a/Source/msfa/fm_core.cc b/Source/msfa/fm_core.cc
index 4c341f9..1e9d2b9 100644
--- a/Source/msfa/fm_core.cc
+++ b/Source/msfa/fm_core.cc
@@ -48,9 +48,9 @@ const FmAlgorithm algorithms[32] = {
   { { 0xc1, 0x11, 0x11, 0x14, 0x01, 0x14 } }, // 1
   { { 0x01, 0x11, 0x11, 0x14, 0xc1, 0x14 } }, // 2
   { { 0xc1, 0x11, 0x14, 0x01, 0x11, 0x14 } }, // 3
-  { { 0xe1, 0x11, 0x94, 0x01, 0x11, 0x14 } }, // 4
+  { { 0xc1, 0x11, 0x94, 0x01, 0x11, 0x14 } }, // 4 ** EXCEPTION VIA CODE
   { { 0xc1, 0x14, 0x01, 0x14, 0x01, 0x14 } }, // 5
-  { { 0xd1, 0x94, 0x01, 0x14, 0x01, 0x14 } }, // 6
+  { { 0xc1, 0x94, 0x01, 0x14, 0x01, 0x14 } }, // 6 ** EXCEPTION VIA CODE
   { { 0xc1, 0x11, 0x05, 0x14, 0x01, 0x14 } }, // 7
   { { 0x01, 0x11, 0xc5, 0x14, 0x01, 0x14 } }, // 8
   { { 0x01, 0x11, 0x05, 0x14, 0xc1, 0x14 } }, // 9
@@ -130,28 +130,33 @@ void FmCore::compute(int32_t *output, FmOpParams *params, int algorithm,
         // PG: this is my 'dirty' implementation of FB for 2 and 3 operators...
         // still needs some tuning...
         if ((flags & 0xc0) == 0xc0 && feedback_shift < 16) {
-          switch ( (flags >> 6) - 0xc ) {
-          // one operator feedback, normal process
-          case 0 :
-            //cout << "\t" << op << " fb " << inbus << outbus << add << endl;
-            FmOpKernel::compute_fb(outptr, param.phase, param.freq,
-                gain1, gain2,
-                fb_buf, feedback_shift, add, controllers);
-            break;
+          switch ( algorithm ) {
             // two operator feedback, process exception for ALGO 6
-          case 1 :
+          case 5 :
             FmOpKernel::compute_fb2(outptr, params, fb_buf, feedback_shift, controllers);
-            params[1].phase += params[1].freq << LG_N;  // yuk, hack, we already processed op-5
+            param.phase += param.freq << LG_N;
+            params[1].phase += param.freq + params[1].freq << LG_N;  // yuk, hack, we already processed op-5
             op++; // ignore next operator;
             break;
             // three operator feedback, process exception for ALGO 4
-          case 2 :
+          case 3 :
             FmOpKernel::compute_fb3(outptr, params, fb_buf, feedback_shift, controllers);
-            params[1].phase += params[1].freq << LG_N; // hack, we already processed op-5 - op-4
-            params[2].phase += params[2].freq << LG_N; // yuk yuk
+            param.phase += param.freq << LG_N;
+            params[1].phase += param.freq + params[1].freq << LG_N; // hack, we already processed op-5 - op-4
+            params[2].phase += param.freq + params[1].freq + params[2].freq << LG_N; // yuk yuk
             op += 2; // ignore the 2 other operators
             break;
+          default:
+            // one operator feedback, normal proces
+            //cout << "\t" << op << " fb " << inbus << outbus << add << endl;
+            FmOpKernel::compute_fb(outptr, param.phase, param.freq,
+                                   gain1, gain2,
+                                   fb_buf, feedback_shift, add, controllers);
+            param.phase += param.freq << LG_N;
+            break;
           }
+          has_contents[outbus] = true;            
+          continue;
         } else {
           // cout << op << " pure " << inbus << outbus << add << endl;
           FmOpKernel::compute_pure(outptr, param.phase, param.freq,
diff --git a/Source/msfa/fm_op_kernel.cc b/Source/msfa/fm_op_kernel.cc
index 654bf51..911a143 100644
--- a/Source/msfa/fm_op_kernel.cc
+++ b/Source/msfa/fm_op_kernel.cc
@@ -23,17 +23,9 @@
 #endif
 
 #include "synth.h"
-
 #include "sin.h"
 #include "fm_op_kernel.h"
 
-
-uint32_t restdither() {
-    return rand() & 0x3FFF;
-    return 0;
-
-}
-
 #ifdef HAVE_NEONx
 static bool hasNeon() {
   return true;
@@ -52,8 +44,6 @@ static bool hasNeon() {
 }
 #endif
 
-//#define BIT8 0xFFFFFF00
-
 void FmOpKernel::compute(int32_t *output, const int32_t *input,
                          int32_t phase0, int32_t freq,
                          int32_t gain1, int32_t gain2, bool add, const Controllers *controllers) {
@@ -172,7 +162,7 @@ void FmOpKernel::compute_fb2(int32_t *output, FmOpParams *parms, int32_t *fb_buf
     phase[1] = parms[1].phase;
     
     dgain[0] = (parms[0].gain[1] - parms[0].gain[0] + (N >> 1)) >> LG_N;
-    dgain[1] = (parms[1].gain[1] - parms[1].gain[1] + (N >> 1)) >> LG_N;
+    dgain[1] = (parms[1].gain[1] - parms[1].gain[0] + (N >> 1)) >> LG_N;
     
     gain[0] = parms[0].gain[0];
     gain[1] = parms[1].gain[1];
@@ -188,7 +178,7 @@ void FmOpKernel::compute_fb2(int32_t *output, FmOpParams *parms, int32_t *fb_buf
         
         // op 1
         gain[1] += dgain[1];
-        //scaled_fb = (y0 + y) >> (fb_shift + 1);
+        scaled_fb = (y0 + y) >> (fb_shift + 1);
         y0 = y;
         y = Sin::lookup(phase[1] + scaled_fb + y);
         y = ((int64_t)y * (int64_t)gain) >> 24;
diff --git a/Source/msfa/pitchenv.cc b/Source/msfa/pitchenv.cc
index 4a8de21..a85b8d4 100644
--- a/Source/msfa/pitchenv.cc
+++ b/Source/msfa/pitchenv.cc
@@ -53,7 +53,7 @@ void PitchEnv::set(const int r[4], const int l[4]) {
 }
 
 int32_t PitchEnv::getsample() {
-  if (ix_ < 3 || (ix_ < 4) && !down_) {
+  if (ix_ < 3 || ((ix_ < 4) && !down_)) {
     if (rising_) {
       level_ += inc_;
       if (level_ >= targetlevel_) {