diff --git a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.C b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.C
index 79743d5..ec5fab5 100644
--- a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.C
+++ b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.C
@@ -40,15 +40,23 @@ int GetID()
 
 ///////////////////////////////////////////////////////
 
-NoteSnapPlugin::NoteSnapPlugin()
+NoteSnapPlugin::NoteSnapPlugin() :
+m_Out(0)
 {
 	m_PluginInfo.Name="Note Snap";
-	m_PluginInfo.Width=220;
-	m_PluginInfo.Height=125;
+	m_PluginInfo.Width=90;
+	m_PluginInfo.Height=80;
 	m_PluginInfo.NumInputs=1;
 	m_PluginInfo.NumOutputs=1;
 	m_PluginInfo.PortTips.push_back("Input");	
 	m_PluginInfo.PortTips.push_back("Output");
+	
+	for (int n=0; n<12; n++)
+	{
+		m_Filter[n]=true;
+	}
+	
+	m_AudioCH->Register("Note",&m_Note);
 }
 
 NoteSnapPlugin::~NoteSnapPlugin()
@@ -62,13 +70,14 @@ PluginInfo &NoteSnapPlugin::Initialise(const HostInfo *Host)
 
 SpiralGUIType *NoteSnapPlugin::CreateGUI()
 {
-	return NULL;
+	return new NoteSnapPluginGUI(m_PluginInfo.Width,
+						     m_PluginInfo.Height,
+							 this,m_AudioCH,m_HostInfo);
 }
 
 void NoteSnapPlugin::Execute()
 {	
 	float Freq=0, OldFreq=0;
-	float Out=0;
 	
 	for (int n=0; n<m_HostInfo->BUFSIZE; n++)
 	{
@@ -78,42 +87,46 @@ void NoteSnapPlugin::Execute()
 		{
 			for (int i=0; i<131; i++) // for every note
 			{			
-				if (Freq>=NoteTable[i] && Freq<NoteTable[i+1])
+				if (m_Filter[(i+1)%12] && Freq>=NoteTable[i] && Freq<NoteTable[i+1])
 				{	
-					Out=NoteTable[i];
+					m_Out=NoteTable[i];
 				}
 			}
 		}
 		
 		OldFreq=Freq;
-		SetOutputPitch(0,n,Out);		
+		SetOutputPitch(0,n,m_Out);		
 	}
 }
- 
-int main()
+
+void NoteSnapPlugin::ExecuteCommands()
 {
-	Fl::visual(FL_DOUBLE|FL_RGB);
-	
-	HostInfo host;
-	host.BUFSIZE=256;
-	host.SAMPLERATE=44100;
-	host.OUTPUTFILE="/dev/dsp";
-	host.MIDIFILE="/dev/midi";
-	host.POLY=1;
-	host.GUI_COLOUR=100;
-	
-	
-	SpiralPlugin* test = CreateInstance();
-	test->Initialise(&host);
-    test->CreateGUI();
-		
-    for (;;) 
+	if (m_AudioCH->IsCommandWaiting())
 	{
-    	if (!Fl::check()) break;
-		test->Execute();    	
-  	}
-	
-	delete test;	
+		switch (m_AudioCH->GetCommand())
+		{
+			case NOTE_ON  : m_Filter[m_Note]=true; break;
+			case NOTE_OFF : m_Filter[m_Note]=false; break;
+		}
+	}
+}
 	
-	return 1;	
+void NoteSnapPlugin::StreamOut(ostream &s) 
+{
+	s<<m_Version<<endl;
+	for (int n=0; n<12; n++)
+	{
+		s<<m_Filter[n]<<" ";
+	}
+
+}
+
+void NoteSnapPlugin::StreamIn(istream &s) 
+{
+	int version;
+	s>>version;
+	for (int n=0; n<12; n++)
+	{
+		s>>m_Filter[n];
+	}
 }
diff --git a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.h b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.h
index c465e1b..be2382c 100644
--- a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.h
+++ b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPlugin.h
@@ -31,10 +31,19 @@ public:
 	virtual PluginInfo& Initialise(const HostInfo *Host);
 	virtual SpiralGUIType*  CreateGUI();
 	virtual void 		Execute();
-	virtual void	    StreamOut(ostream &s) {}
-	virtual void	    StreamIn(istream &s) {}
+	virtual void 		ExecuteCommands();
+	virtual void	    StreamOut(ostream &s);
+	virtual void	    StreamIn(istream &s);
+
+	bool GetFilter(int n) { return m_Filter[n]; }
+
+	enum GUICommands{NONE,NOTE_ON,NOTE_OFF};
 
 private:
+
+	int  m_Note;
+	bool m_Filter[12];
+	float m_Out;
 };
 
 #endif
diff --git a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.C b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.C
index 6014517..3737f05 100644
--- a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.C
+++ b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.C
@@ -29,6 +29,53 @@ static const int GUIBG2_COLOUR = 145;
 NoteSnapPluginGUI::NoteSnapPluginGUI(int w, int h,NoteSnapPlugin *o,ChannelHandler *ch,const HostInfo *Info) :
 SpiralPluginGUI(w,h,o,ch)
 {	
+	int KeyWidth=10,Note,Pos=0,Count=0;
+	
+	for (int n=0; n<NUM_KEYS; n++)
+	{
+		m_Num[n]=n;
+		
+		Note = n%12;
+		if (Note!=1 && Note!=3 && Note!=6 && Note!=8 && Note!=10) 
+		{
+			Count++;
+			Pos=Count*KeyWidth;
+			m_Key[n] = new Fl_Button(Pos,20,KeyWidth,50,"");
+			m_Key[n]->type(1);
+			m_Key[n]->selection_color(FL_RED);		
+			m_Key[n]->box(FL_THIN_UP_BOX);
+			m_Key[n]->labelsize(10);
+			m_Key[n]->when(FL_WHEN_CHANGED);
+
+			m_Key[n]->color(FL_WHITE);
+			m_Key[n]->callback((Fl_Callback*)cb_Key, &m_Num[n]);
+			add(m_Key[n]);
+		}	
+	}
+	
+	Count=0;
+	for (int n=0; n<NUM_KEYS; n++)
+	{
+		Note = n%12;
+		if (Note==1 || Note==3 || Note==6 || Note==8 || Note==10) 
+		{
+			m_Key[n] = new Fl_Button(Pos+5,20,KeyWidth,30,"");
+			m_Key[n]->type(1);
+			m_Key[n]->selection_color(FL_RED);		
+			m_Key[n]->box(FL_THIN_UP_BOX);
+			m_Key[n]->labelsize(10);
+			m_Key[n]->when(FL_WHEN_CHANGED);
+			m_Key[n]->color(FL_BLACK);
+			m_Key[n]->callback((Fl_Callback*)cb_Key, &m_Num[n]);
+			add(m_Key[n]);
+		}
+		else
+		{
+			Count++;
+			Pos=Count*KeyWidth;
+		}
+	}
+	
 	end();
 }
 
@@ -36,10 +83,36 @@ SpiralPluginGUI(w,h,o,ch)
 
 void NoteSnapPluginGUI::UpdateValues(SpiralPlugin *o)
 {
+	NoteSnapPlugin *Plugin = (NoteSnapPlugin *)o;
+	for (int n=0; n<12; n++)
+	{
+		m_Key[n]->value(!Plugin->GetFilter(n));
+	}
+}
+
+//// Callbacks ////
+inline void NoteSnapPluginGUI::cb_Key_i(Fl_Button* o, void* v) 
+{ 
+	int k=*(int*)(v);
+	if (o->value()) 
+	{
+		m_GUICH->Set("Note",k);
+		m_GUICH->SetCommand(NoteSnapPlugin::NOTE_OFF); 
+	}
+	else
+	{
+		m_GUICH->Set("Note",k);
+		m_GUICH->SetCommand(NoteSnapPlugin::NOTE_ON); 
+	}
+	parent()->redraw();
 }
+void NoteSnapPluginGUI::cb_Key(Fl_Button* o, void* v) 
+{ ((NoteSnapPluginGUI*)(o->parent()))->cb_Key_i(o,v);}
 	
 const string NoteSnapPluginGUI::GetHelpText(const string &loc){
     return string("")
     + "Quantises the input value into a note frequency\n"
-    + "(using the midi note data).\n";
+    + "(using the midi note data).\n"
+	+ "Use the keyboard to select notes to be filtered out\n"
+	+ "for generating scales and chords";
 }
diff --git a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.h b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.h
index 0531530..581aff0 100644
--- a/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.h
+++ b/SpiralSound/Plugins/NoteSnapPlugin/NoteSnapPluginGUI.h
@@ -29,7 +29,7 @@
 #ifndef SplitterGUI
 #define SplitterGUI
 
-
+static const int NUM_KEYS = 12;
 class NoteSnapPluginGUI : public SpiralPluginGUI
 {
 public:
@@ -41,8 +41,12 @@ protected:
     const string GetHelpText(const string &loc);	
 
 private:
-
+	int         m_Num[NUM_KEYS];
+	Fl_Button*  m_Key[NUM_KEYS];
+	
 	//// Callbacks ////
+	inline void cb_Key_i(Fl_Button* o, void* v);
+	static void cb_Key(Fl_Button* o, void* v); 
 };
 
 #endif