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 5206ff0..e76535f 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/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index 079bdfd..5c3c841 100755
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -135,8 +135,7 @@ void DexedAudioProcessorEditor::buttonClicked(Button *buttonThatWasClicked) {
         if ( fc.browseForFileToOpen()) {
             String f = fc.getResults().getReference(0).getFullPathName();
             uint8_t syx_data[4104];
-            ifstream fp_in;
-            fp_in.open(f.toRawUTF8(), ifstream::in);
+            ifstream fp_in(f.toRawUTF8(), ios::binary);
             if (fp_in.fail()) {
                 AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon,
                                                   "Error",
diff --git a/Source/PluginFx.cpp b/Source/PluginFx.cpp
index 1f3c27c..2b9b5a5 100644
--- a/Source/PluginFx.cpp
+++ b/Source/PluginFx.cpp
@@ -13,6 +13,7 @@
 
 #include "math.h"
 #include "PluginFx.h"
+#include "PluginProcessor.h"
 
 static float gaintable[199] = {
     0.999969, 0.990082, 0.980347, 0.970764, 0.961304, 0.951996, 0.94281, 0.933777, 0.924866, 0.916077, 0.90741, 0.898865, 0.890442,
@@ -45,7 +46,7 @@ static inline float crossfade(float amount, float a, float b) {
 }
 
 void PluginFx::init(int sampleRate) {
-    uiCutoff = 0;
+    uiCutoff = 1;
     uiReso = 0;
     srate = sampleRate;
 	output = 0;
@@ -54,10 +55,16 @@ void PluginFx::init(int sampleRate) {
 }
 
 void PluginFx::process(float *work, int sampleSize) {
+
+    // don't apply the LPF if the cutoff is to maximum
+    if ( uiCutoff == 1 )
+        return;
+    
 	// the UI values haved changed
 	if ( uiCutoff != pCutoff || uiReso != pReso) {
 		// calc cutoff
-		float freqCutoff = uiCutoff * 22000;
+        // mel scale freq : http://www.speech.kth.se/~giampi/auditoryscales/
+		float freqCutoff = 700 * (pow(M_E,(uiCutoff*4000/1127)-1)) + 20;
     	float fc = 2 * freqCutoff / srate;
     	float x2 = fc*fc;
 		float x3 = fc*x2;
@@ -74,7 +81,7 @@ void PluginFx::process(float *work, int sampleSize) {
 	}
   
   	for (int i=0; i < sampleSize; i++ ) {
-		output = 0.25 * ( work[i] - output ); //negative feedback
+		output = 0.10 * ( work[i] - output ); //negative feedback
 		for(int pole=0; pole < 4; pole++) {
 			float temp = state[pole];
 			output = saturate( output + p * (output - temp));
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index fd1995a..72d830b 100755
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -58,7 +58,8 @@ void DexedAudioProcessor::prepareToPlay(double sampleRate, int samplesPerBlock)
     Freqlut::init(sampleRate);
     Lfo::init(sampleRate);
     PitchEnv::init(sampleRate);
-
+    fx.init(sampleRate);
+    
     for (int note = 0; note < MAX_ACTIVE_NOTES; ++note) {
         voices[note].dx7_note = new Dx7Note;
         voices[note].keydown = false;
@@ -136,7 +137,7 @@ void DexedAudioProcessor::processBlock(AudioSampleBuffer& buffer, MidiBuffer& mi
         channelData[i] = (double) f;
    }
 
-    //fx.process(channelData, numSamples);
+    fx.process(channelData, numSamples);
     
     // DX7 is a mono synth
     for (int channel = 1; channel < getNumInputChannels(); ++channel) {
@@ -176,8 +177,6 @@ void DexedAudioProcessor::processMidiMessage(MidiMessage *msg) {
             TRACE("not a yamaha sysex %d", buf[0]);
             return;
         }
-
-        TRACE("buf 2 %d", buf[2]);
         
         // single voice dump
         if ( buf[2] == 0 ) {
@@ -313,6 +312,7 @@ void DexedAudioProcessor::processSamples(int n_samples, int16_t *buffer) {
             int32_t val = audiobuf.get()[j] >> 4;
             int clip_val = val < -(1 << 24) ? 0x8000 : val >= (1 << 24) ? 0x7fff :
             val >> 9;
+            val = val & 0x0FFF7000;
             // TODO: maybe some dithering?
             if (j < jmax) {
                 buffer[i + j] = clip_val;