diff --git a/Source/CustomLookAndFeel.cpp b/Source/CustomLookAndFeel.cpp
index 3d2e8ac..ea5c915 100644
--- a/Source/CustomLookAndFeel.cpp
+++ b/Source/CustomLookAndFeel.cpp
@@ -41,7 +41,7 @@ CustomLookAndFeel::CustomLookAndFeel()
     
     //setColour (ComboBox::backgroundColourId, Colour (0xff161616));
     setColour (ComboBox::backgroundColourId, Colour::fromFloatRGBA(0.15, 0.15, 0.15, 0.7));
-    setColour (ComboBox::textColourId, Colour (0xffe9e9e9));
+    setColour (ComboBox::textColourId, Colour (0xdde9e9e9));
     setColour (ComboBox::outlineColourId, Colour::fromFloatRGBA(0.3, 0.3, 0.3, 0.5));
 
     setColour (TextEditor::backgroundColourId, Colour (0xff050505));
diff --git a/Source/PS_Source/BinauralBeats.h b/Source/PS_Source/BinauralBeats.h
index 1b0fd48..7e9373b 100644
--- a/Source/PS_Source/BinauralBeats.h
+++ b/Source/PS_Source/BinauralBeats.h
@@ -95,6 +95,18 @@ struct BinauralBeatsParameters{
 	FreeEdit free_edit;
 	//void add2XML(XMLwrapper *xml);
 	//void getfromXML(XMLwrapper *xml);
+
+    bool operator == (const BinauralBeatsParameters& other) const noexcept
+    {
+        return stereo_mode == other.stereo_mode &&
+        mono == other.mono &&
+        free_edit.get_enabled() == other.free_edit.get_enabled() &&
+        // todo proper equality test for filter
+        free_edit.get_posy(0) == other.free_edit.get_posy(0) &&
+        free_edit.get_posy(1) == other.free_edit.get_posy(1)
+
+        ;
+    }
 };
 
 class BinauralBeats{
diff --git a/Source/PS_Source/FreeEdit.cpp b/Source/PS_Source/FreeEdit.cpp
index 1d5b2c5..24295ad 100644
--- a/Source/PS_Source/FreeEdit.cpp
+++ b/Source/PS_Source/FreeEdit.cpp
@@ -40,6 +40,7 @@ FreeEdit::FreeEdit(){
 			
 			curve.data=NULL;
 			curve.size=0;
+            curve.allocsize = 0;
 };
 
 void FreeEdit::deep_copy_from(const FreeEdit &other){
@@ -55,9 +56,14 @@ void FreeEdit::deep_copy_from(const FreeEdit &other){
 	};
 	curve.size=other.curve.size;
 	if (other.curve.data&&other.curve.size){
-		curve.data=new REALTYPE[curve.size];
+        if (curve.data) delete [] curve.data;
+        curve.data=new REALTYPE[curve.size];
+        curve.allocsize = curve.size;
 		for (int i=0;i<curve.size;i++) curve.data[i]=other.curve.data[i];
-	}else curve.data=NULL;
+    } else {
+        if (curve.data) delete [] curve.data;
+        curve.data=NULL;
+    }
 	extreme_x=other.extreme_x;
 	extreme_y=other.extreme_y;
 };
@@ -140,10 +146,16 @@ void FreeEdit::get_curve(int datasize,REALTYPE *data,bool real_values){
 };
 
 void FreeEdit::update_curve(int size){
-	if (curve.data) delete []curve.data;
 	if (size<2) size=2;
-	curve.size=size;
-	curve.data=new REALTYPE[size];
+
+    if (size > curve.allocsize || !curve.data) {
+        if (curve.data) delete []curve.data;
+        curve.data = new REALTYPE[size];
+        curve.allocsize = size;
+    }
+
+    curve.size = size;
+
 
 	get_curve(curve.size,curve.data,true);
 
diff --git a/Source/PS_Source/FreeEdit.h b/Source/PS_Source/FreeEdit.h
index 06f3250..5edf2e5 100644
--- a/Source/PS_Source/FreeEdit.h
+++ b/Source/PS_Source/FreeEdit.h
@@ -152,10 +152,10 @@ class FreeEdit{
 		//void getfromXML(XMLwrapper *xml);
 
 		//Enabled functions
-		bool get_enabled(){
+		bool get_enabled() const{
 			return enabled;
 		};
-		void set_enabled(bool val){			
+		void set_enabled(bool val){
 			enabled=val;
 		};
 
@@ -164,7 +164,7 @@ class FreeEdit{
 		};
 
 		//manipulation functions
-		inline bool is_enabled(int n){
+		inline bool is_enabled(int n) const{
 			if ((n<0)||(n>=npos)) return false;
 			return pos[n].enabled;
 		};
@@ -174,11 +174,11 @@ class FreeEdit{
 		};
 
 
-		inline REALTYPE get_posx(int n){
+		inline REALTYPE get_posx(int n) const{
 			if ((n<0)||(n>=npos)) return 0.0;
 			return pos[n].x;
 		};
-		inline REALTYPE get_posy(int n){
+		inline REALTYPE get_posy(int n) const{
 			if ((n<0)||(n>=npos)) return 0.0;
 			return pos[n].y;
 		};
@@ -198,7 +198,7 @@ class FreeEdit{
 		};
 
 		//interpolation mode
-		INTERP_MODE get_interp_mode(){
+		INTERP_MODE get_interp_mode() const{
 			return interp_mode;
 		};
 		void set_interp_mode(INTERP_MODE interp_mode_){
@@ -206,7 +206,7 @@ class FreeEdit{
 		};
 
 		//smooth
-		REALTYPE get_smooth(){
+		REALTYPE get_smooth() const{
 			return smooth;
 		};
 		void set_smooth(REALTYPE smooth_){
@@ -230,6 +230,7 @@ class FreeEdit{
 		struct{
 			REALTYPE *data;
 			int size;
+            int allocsize;
 		}curve;
 	private:
 		inline REALTYPE clamp1(REALTYPE m){
diff --git a/Source/PS_Source/StretchSource.cpp b/Source/PS_Source/StretchSource.cpp
index 2c60a25..d700886 100644
--- a/Source/PS_Source/StretchSource.cpp
+++ b/Source/PS_Source/StretchSource.cpp
@@ -34,6 +34,7 @@ StretchAudioSource::StretchAudioSource(int initialnumoutchans,
 	setNumOutChannels(initialnumoutchans);
 	m_xfadetask.buffer.setSize(8, 65536);
 	m_xfadetask.buffer.clear();
+
 }
 
 StretchAudioSource::~StretchAudioSource()
@@ -333,7 +334,9 @@ void StretchAudioSource::getNextAudioBlock(const AudioSourceChannelInfo & buffer
 		{
 			int readsize = 0;
 			double in_pos = (double)m_inputfile->getCurrentPosition() / (double)m_inputfile->info.nsamples;
-			if (m_firstbuffer)
+            float in_pos_100 = in_pos*100.0;
+
+            if (m_firstbuffer)
 			{
 				readsize = m_stretchers[0]->get_nsamples_for_fill();
 				m_firstbuffer = false;
@@ -375,6 +378,12 @@ void StretchAudioSource::getNextAudioBlock(const AudioSourceChannelInfo & buffer
 			for (int i = 0; i < m_stretchers.size(); ++i)
 				m_stretchers[i]->here_is_onset(onset_max);
 			int outbufsize = m_stretchers[0]->get_bufsize();
+
+            if (m_stretchers.size() > 1) {
+                m_binaural_beats->process(m_stretchers[0]->out_buf.data(),m_stretchers[1]->out_buf.data(),
+                                          outbufsize, in_pos_100);
+            }
+
 			int nskip = m_stretchers[0]->get_skip_nsamples();
 			if (nskip > 0)
 				m_inputfile->skip(nskip);
@@ -578,6 +587,9 @@ void StretchAudioSource::initObjects()
 		fill_container(m_stretchers[i]->out_buf, 0.0f);
 		m_stretchers[i]->m_spectrum_processes = m_specproc_order;
 	}
+    m_binaural_beats = std::make_unique<BinauralBeats>(m_inputfile->info.samplerate);
+    m_binaural_beats->pars = m_bbpar;
+
 	m_file_inbuf.setSize(m_num_outchans, 3 * inbufsize);
 }
 
@@ -652,13 +664,18 @@ void StretchAudioSource::setRate(double rate)
 	}
 }
 
-void StretchAudioSource::setProcessParameters(ProcessParameters * pars)
+void StretchAudioSource::setProcessParameters(ProcessParameters * pars, BinauralBeatsParameters * bbpars)
 {
-	if (*pars == m_ppar)
+	if (*pars == m_ppar && (!bbpars || m_bbpar == *bbpars))
 		return;
 	if (m_cs.tryEnter())
 	{
 		m_ppar = *pars;
+        if (bbpars) {
+            m_bbpar = *bbpars;
+            m_binaural_beats->pars = m_bbpar;
+        }
+
 		for (int i = 0; i < m_stretchers.size(); ++i)
 		{
 			m_stretchers[i]->set_parameters(pars);
diff --git a/Source/PS_Source/StretchSource.h b/Source/PS_Source/StretchSource.h
index bc57cfd..69ed379 100644
--- a/Source/PS_Source/StretchSource.h
+++ b/Source/PS_Source/StretchSource.h
@@ -7,6 +7,7 @@
 #include "../JuceLibraryCode/JuceHeader.h"
 #include "Input/AInputS.h"
 #include "ProcessedStretch.h"
+#include "BinauralBeats.h"
 #include <mutex>
 #include <array>
 #include "../WDL/resample.h"
@@ -49,7 +50,7 @@ public:
 		return m_playrate; 
 	}
 	double getOutputSamplerate() const { return m_outsr; }
-	void setProcessParameters(ProcessParameters* pars);
+	void setProcessParameters(ProcessParameters* pars, BinauralBeatsParameters * bbpars=0);
 	const ProcessParameters& getProcessParameters();
 	void setFFTSize(int size, bool force=false);
 	int getFFTSize() { return m_process_fftsize; }
@@ -111,7 +112,9 @@ private:
 	LinearSmoothedValue<double> m_vol_smoother;
 	std::unique_ptr<AInputS> m_inputfile;
 	std::vector<std::shared_ptr<ProcessedStretch>> m_stretchers;
-	
+
+    std::unique_ptr<BinauralBeats> m_binaural_beats;
+
 	std::function<void(StretchAudioSource*)> SourceEndedCallback;
 	bool m_firstbuffer = false;
 	bool m_output_has_begun = false;
@@ -122,7 +125,8 @@ private:
 	double m_main_volume = 0.0;
 	double m_loopxfadelen = 0.0;
 	ProcessParameters m_ppar;
-	
+    BinauralBeatsParameters m_bbpar;
+
 	double m_playrate = 1.0;
 	double m_lastplayrate = 0.0;
 	double m_onsetdetection = 0.0;
diff --git a/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index 82d5f81..087e38f 100644
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -240,7 +240,9 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor(Pau
     addAndMakeVisible(m_groupviewport.get());
 
     m_stretchgroup = std::make_unique<ParameterGroupComponent>("", -1, &processor, true);
-    m_stretchgroup->setBackgroundColor(Colour(0xff332244));
+    m_stretchgroup->setBackgroundColor(Colour(0xcc332244));
+    m_stretchgroup->setSelectedBackgroundColor(Colour(0xff332244));
+    m_stretchgroup->allowDisableFade = false;
     m_stretchgroup->setToggleEnabled( ! *processor.getBoolParameter(cpi_bypass_stretch));
     if (*processor.getBoolParameter(cpi_bypass_stretch)) {
         m_stretchgroup->addParameterComponent(m_parcomps[cpi_dryplayrate].get());
@@ -253,11 +255,30 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor(Pau
     m_stretchgroup->EnabledChangedCallback = [this]() {
         toggleBool(processor.getBoolParameter(cpi_bypass_stretch));
         m_stretchgroup->setToggleEnabled( ! *processor.getBoolParameter(cpi_bypass_stretch));
+        m_stretchgroup->updateParameterComponents();
     };
 
     addAndMakeVisible(m_stretchgroup.get());
 
 
+    m_binauralgroup = std::make_unique<ParameterGroupComponent>("", -1, &processor, true);
+    //m_binauralgroup->setBackgroundColor(Colour(0xff332244));
+    m_binauralgroup->setToggleEnabled( *processor.getBoolParameter(cpi_binauralbeats));
+    m_binauralgroup->addParameterComponent(m_parcomps[cpi_binauralbeats_mono].get());
+    m_binauralgroup->addParameterComponent(m_parcomps[cpi_binauralbeats_mode].get());
+    m_binauralgroup->addParameterComponent(m_parcomps[cpi_binauralbeats_freq].get());
+    m_parcomps[cpi_binauralbeats_freq]->getSlider()->setNumDecimalPlacesToDisplay(2);
+    m_binauralgroup->EnabledChangedCallback = [this]() {
+        toggleBool(processor.getBoolParameter(cpi_binauralbeats));
+        m_binauralgroup->setToggleEnabled( *processor.getBoolParameter(cpi_binauralbeats));
+        m_binauralgroup->updateParameterComponents();
+    };
+
+    m_groupcontainer->addAndMakeVisible(m_binauralgroup.get());
+    removeChildComponent(m_parcomps[cpi_binauralbeats].get());
+
+
+
     m_posgroup = std::make_unique<ParameterGroupComponent>("", -1, &processor, false);
     m_posgroup->addParameterComponent(m_parcomps[cpi_loopxfadelen].get());
     m_posgroup->addParameterComponent(m_parcomps[cpi_onsetdetection].get());
@@ -837,6 +858,10 @@ void PaulstretchpluginAudioProcessorEditor::resized()
     groupsbox.items.add(FlexItem(minw, minh, *m_pargroups[FilterGroup]).withMargin(groupmargin));
     gheight += minh + 2*groupmargin;
 
+    minh = m_binauralgroup->getMinimumHeight(groupw);
+    groupsbox.items.add(FlexItem(minw, minh, *m_binauralgroup).withMargin(groupmargin));
+    gheight += minh + 2*groupmargin;
+
     minh = m_posgroup->getMinimumHeight(groupw);
     groupsbox.items.add(FlexItem(minw, minh, *m_posgroup).withMargin(groupmargin));
     gheight += minh + 2*groupmargin;
@@ -1111,6 +1136,9 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
 
         m_stretchgroup->setToggleEnabled(!*processor.getBoolParameter(cpi_bypass_stretch));
 
+        m_binauralgroup->setToggleEnabled(*processor.getBoolParameter(cpi_binauralbeats));
+        m_binauralgroup->updateParameterComponents();
+
         if (AudioParameterBool* enablepar = dynamic_cast<AudioParameterBool*>(processor.getBoolParameter(cpi_pause_enabled))) {
             m_perfmeter.enabled = !enablepar->get();
         }
@@ -1195,6 +1223,8 @@ bool PaulstretchpluginAudioProcessorEditor::keyPressed(const KeyPress & press)
 	std::function<bool(void)> action;
 	if (press == 'I')
 		action = [this]() { m_import_button.onClick(); ; return true; };
+    else if (press == KeyPress::spaceKey)
+        action = [this]() { toggleBool(processor.getBoolParameter(cpi_pause_enabled)); ; return true; };
 	return action && action();
 }
 
@@ -2110,8 +2140,11 @@ ParameterComponent::ParameterComponent(AudioProcessorParameter * par, bool notif
 	AudioParameterChoice* choicepar = dynamic_cast<AudioParameterChoice*>(par);
 	if (choicepar)
 	{
-
-	}
+        m_combobox = XenUtils::makeAddAndMakeVisible<ComboBox>(*this);
+        m_combobox->addItemList(choicepar->getAllValueStrings(), 1);
+        m_combobox->setTitle(choicepar->getName(50));
+        m_combobox->addListener(this);
+    }
 	AudioParameterBool* boolpar = dynamic_cast<AudioParameterBool*>(par);
 	if (boolpar)
 	{
@@ -2174,6 +2207,9 @@ void ParameterComponent::resized()
     else if (m_drawtogglebut) {
         m_drawtogglebut->setBounds(1, 0, getWidth() - 1, h);
     }
+    else if (m_combobox) {
+        m_combobox->setBounds(1, 0, getWidth() - 1, h);
+    }
 
 }
 
@@ -2207,6 +2243,15 @@ void ParameterComponent::sliderDragEnded(Slider * slid)
 		*intpar = slid->getValue();
 }
 
+void ParameterComponent::comboBoxChanged (ComboBox* comboBoxThatHasChanged)
+{
+    AudioParameterChoice* choicepar = dynamic_cast<AudioParameterChoice*>(m_par);
+    if (choicepar) {
+        choicepar->setValueNotifyingHost(choicepar->convertTo0to1(m_combobox->getSelectedItemIndex()));
+    }
+}
+
+
 void ParameterComponent::buttonClicked(Button * but)
 {
 	AudioParameterBool* boolpar = dynamic_cast<AudioParameterBool*>(m_par);
@@ -2234,7 +2279,13 @@ void ParameterComponent::updateComponent()
 	{
 		m_slider->setValue(*intpar, dontSendNotification);
 	}
-	AudioParameterBool* boolpar = dynamic_cast<AudioParameterBool*>(m_par);
+    AudioParameterChoice* choicepar = dynamic_cast<AudioParameterChoice*>(m_par);
+    if (choicepar != nullptr && m_combobox != nullptr && m_combobox->getSelectedItemIndex() != choicepar->getIndex())
+    {
+        m_combobox->setSelectedItemIndex(choicepar->getIndex(), dontSendNotification);
+    }
+
+    AudioParameterBool* boolpar = dynamic_cast<AudioParameterBool*>(m_par);
     if (boolpar!=nullptr) {
         if ( m_togglebut != nullptr)
         {
@@ -2849,6 +2900,7 @@ int ParameterGroupComponent::doLayout(Rectangle<int> bounds)
     int enablew = m_enableButton ? 40 : 0;
     int enablemaxh = 34;
     int minitemw = 260;
+    int choiceminitemw = 110;
     int minitemh = 26;
     int margin = 1;
     int outsidemargin = 4;
@@ -2887,7 +2939,12 @@ int ParameterGroupComponent::doLayout(Rectangle<int> bounds)
 
     for (int i = 0; i < m_parcomps.size(); ++i)
     {
-        contentbox.items.add(FlexItem(minitemw, minitemh, *m_parcomps[i]).withMargin(margin).withFlex(1));
+        if (m_parcomps[i]->getComboBox()) {
+            contentbox.items.add(FlexItem(choiceminitemw, minitemh, *m_parcomps[i]).withMargin(margin).withFlex(0.1));
+        }
+        else {
+            contentbox.items.add(FlexItem(minitemw, minitemh, *m_parcomps[i]).withMargin(margin).withFlex(1));
+        }
     }
 
     mainbox.items.add(FlexItem(minitemw, minitemh, contentbox).withFlex(1).withMargin(outsidemargin));
@@ -2908,7 +2965,7 @@ void ParameterGroupComponent::resized()
 
 void ParameterGroupComponent::paint(Graphics & g)
 {
-    if (m_enableButton && groupId >= 0 && m_enableButton->getToggleState()) {
+    if (m_enableButton && m_enableButton->getToggleState()) {
         g.setColour(m_selbgcolor);
     } else {
         g.setColour(m_bgcolor);
@@ -2932,10 +2989,13 @@ void ParameterGroupComponent::updateParameterComponents()
             }
         }
     }
+    else if (m_enableButton) {
+        enabled = m_enableButton->getToggleState();
+    }
 
     for (auto& e : m_parcomps) {
         e->updateComponent();
-        e->setAlpha(enabled ? 1.0f : 0.5f);
+        e->setAlpha((enabled || !allowDisableFade) ? 1.0f : 0.5f);
     }
     repaint();
 }
diff --git a/Source/PluginEditor.h b/Source/PluginEditor.h
index fdc51eb..91caa72 100644
--- a/Source/PluginEditor.h
+++ b/Source/PluginEditor.h
@@ -71,7 +71,7 @@ private:
 };
 
 class ParameterComponent : public Component,
-	public Slider::Listener, public Button::Listener
+public Slider::Listener, public Button::Listener, public ComboBox::Listener
 {
 public:
 	ParameterComponent(AudioProcessorParameter* par, bool notifyOnlyOnRelease, bool useDrawableToggle=false);
@@ -80,6 +80,7 @@ public:
 	void sliderDragStarted(Slider* slid) override;
 	void sliderDragEnded(Slider* slid) override;
 	void buttonClicked(Button* but) override;
+    void comboBoxChanged (ComboBox* comboBoxThatHasChanged);
 	void updateComponent();
 	void setHighLighted(bool b);
 	int m_group_id = -1;
@@ -87,6 +88,7 @@ public:
 
     DrawableButton* getDrawableButton() const { return m_drawtogglebut.get(); }
     ToggleButton* getToggleButton() const { return m_togglebut.get(); }
+    ComboBox* getComboBox() const { return m_combobox.get(); }
 
 private:
 	Label m_label;
@@ -117,11 +119,15 @@ public:
     void setBackgroundColor(Colour col) { m_bgcolor = col; }
     Colour getBackgroundColor() const { return m_bgcolor; }
 
+    void setSelectedBackgroundColor(Colour col) { m_selbgcolor = col; }
+    Colour getSelectedBBackgroundColor() const { return m_selbgcolor; }
+
     void setToggleEnabled(bool flag){ if (m_enableButton)  m_enableButton->setToggleState(flag, dontSendNotification); }
     bool getToggleEnabled() const { if (m_enableButton) return m_enableButton->getToggleState(); return false; }
 
     String name;
     int groupId = -1;
+    bool allowDisableFade = true;
 
     int getMinimumHeight(int forWidth);
 
@@ -558,6 +564,7 @@ private:
     std::map<int, std::unique_ptr<ParameterGroupComponent> > m_pargroups;
     std::unique_ptr<ParameterGroupComponent> m_posgroup;
     std::unique_ptr<ParameterGroupComponent> m_stretchgroup;
+    std::unique_ptr<ParameterGroupComponent> m_binauralgroup;
 
     std::unique_ptr<Viewport> m_groupviewport;
     std::unique_ptr<Component> m_groupcontainer;
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index 051341f..605e41c 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -149,8 +149,8 @@ m_bufferingthread("pspluginprebufferthread"), m_is_stand_alone_offline(is_stand_
 	m_sm_enab_pars[3] = new AudioParameterBool("enab_specmodule3", "Enable pitch shift", true);
 	m_sm_enab_pars[4] = new AudioParameterBool("enab_specmodule4", "Enable ratios", false);
 	m_sm_enab_pars[5] = new AudioParameterBool("enab_specmodule5", "Enable spread", false);
-	m_sm_enab_pars[6] = new AudioParameterBool("enab_specmodule6", "Enable filter", true);
-	m_sm_enab_pars[7] = new AudioParameterBool("enab_specmodule7", "Enable free filter", true);
+	m_sm_enab_pars[6] = new AudioParameterBool("enab_specmodule6", "Enable filter", false);
+	m_sm_enab_pars[7] = new AudioParameterBool("enab_specmodule7", "Enable free filter", false);
 	m_sm_enab_pars[8] = new AudioParameterBool("enab_specmodule8", "Enable compressor", false);
 	
     DBG("making stretch source");
@@ -274,7 +274,17 @@ m_bufferingthread("pspluginprebufferthread"), m_is_stand_alone_offline(is_stand_
 	addParameter(new AudioParameterFloat("dryplayrate0", "Dry playrate",
 		NormalisableRange<float>(0.1f, 8.0f,
 			dprate_convertFrom0To1Func, dprate_convertTo0To1Func), 1.0f)); // 62
-	
+
+    addParameter(new AudioParameterBool("binauralbeats", "BinauralBeats Enable", false)); // 63
+    addParameter(new AudioParameterFloat("binauralbeatsmono", "Binaural Beats Power", 0.0, 1.0, 0.5)); // 64
+    //addParameter(new AudioParameterFloat("binauralbeatsfreq", "BinauralBeats Freq", 0.0, 1.0, 0.5)); // 65
+    addParameter(new AudioParameterFloat("binauralbeatsfreq", "Binaural Beats Freq",
+                                         NormalisableRange<float>(0.05f, 50.0f, 0.0f, 0.25f), 4.0f)); // 65
+    addParameter(new AudioParameterChoice  ("binauralbeatsmode", "BinauralBeats Mode", { "Left-Right", "Right-Left", "Symmetric" }, 0)); // 66
+
+    m_bbpar.free_edit.extreme_y.set_min(0.05f);
+    m_bbpar.free_edit.extreme_y.set_max(50.0f);
+
 	auto& pars = getParameters();
 	for (const auto& p : pars)
 		m_reset_pars.push_back(p->getValue());
@@ -586,7 +596,7 @@ void PaulstretchpluginAudioProcessor::startplay(Range<double> playrange, int num
     }
 	m_stretch_source->setNumOutChannels(numoutchans);
 	m_stretch_source->setFFTSize(m_fft_size_to_use, true);
-	m_stretch_source->setProcessParameters(&m_ppar);
+	m_stretch_source->setProcessParameters(&m_ppar, &m_bbpar);
 	m_stretch_source->m_prebuffersize = bufamt;
 	
 	m_last_outpos_pos = 0.0;
@@ -604,7 +614,7 @@ void PaulstretchpluginAudioProcessor::setParameters(const std::vector<double>& p
 	}
 }
 
-void PaulstretchpluginAudioProcessor::updateStretchParametersFromPluginParameters(ProcessParameters & pars)
+void PaulstretchpluginAudioProcessor::updateStretchParametersFromPluginParameters(ProcessParameters & pars, BinauralBeatsParameters & bbpar)
 {
 	pars.pitch_shift.cents = *getFloatParameter(cpi_pitchshift) * 100.0;
 	pars.freq_shift.Hz = *getFloatParameter(cpi_frequencyshift);
@@ -642,6 +652,21 @@ void PaulstretchpluginAudioProcessor::updateStretchParametersFromPluginParameter
 
 	pars.tonal_vs_noise.bandwidth = *getFloatParameter(cpi_tonalvsnoisebw);
 	pars.tonal_vs_noise.preserve = *getFloatParameter(cpi_tonalvsnoisepreserve);
+
+    bbpar.stereo_mode = (BB_STEREO_MODE) getChoiceParameter(cpi_binauralbeats_mode)->getIndex();
+    bbpar.mono = *getFloatParameter(cpi_binauralbeats_mono);
+    //bbpar.free_edit.set_all_values( *getFloatParameter(cpi_binauralbeats_freq));
+    auto * bbfreqp = getFloatParameter(cpi_binauralbeats_freq);
+    float bbfreq = *bbfreqp;
+    float bbratio = (bbfreq - bbfreqp->getNormalisableRange().getRange().getStart()) / bbfreqp->getNormalisableRange().getRange().getLength();
+    if (bbpar.free_edit.get_posy(0) != bbratio) {
+        bbpar.free_edit.set_posy(0, bbratio);
+        bbpar.free_edit.set_posy(1, bbratio);
+        bbpar.free_edit.update_curve(2);
+    }
+    //bbpar.mono = 0.5f;
+    bbpar.free_edit.set_enabled(*getBoolParameter(cpi_binauralbeats));
+
 }
 
 void PaulstretchpluginAudioProcessor::saveCaptureBuffer()
@@ -746,7 +771,7 @@ String PaulstretchpluginAudioProcessor::offlineRender(OfflineRenderParams render
     sc->setPaused(false);
 
 	processor->setFFTSize(*processor->getFloatParameter(cpi_fftsize), true);
-	processor->updateStretchParametersFromPluginParameters(processor->m_ppar);
+	processor->updateStretchParametersFromPluginParameters(processor->m_ppar, processor->m_bbpar);
 	processor->setPlayConfigDetails(2, numoutchans, outsr, blocksize);
 	processor->prepareToPlay(outsr, blocksize);
 
@@ -865,7 +890,7 @@ void PaulstretchpluginAudioProcessor::prepareToPlay(double sampleRate, int sampl
 	if (m_prebuffering_inited == false)
 	{
 		setFFTSize(*getFloatParameter(cpi_fftsize), true);
-		m_stretch_source->setProcessParameters(&m_ppar);
+		m_stretch_source->setProcessParameters(&m_ppar, &m_bbpar);
 		m_stretch_source->setFFTWindowingType(1);
 		String err;
 		startplay({ *getFloatParameter(cpi_soundstart),*getFloatParameter(cpi_soundend) },
@@ -1144,7 +1169,7 @@ void PaulstretchpluginAudioProcessor::processBlock (AudioSampleBuffer& buffer, M
 	m_stretch_source->setDryPlayrate(*getFloatParameter(cpi_dryplayrate));
 	setFFTSize(*getFloatParameter(cpi_fftsize));
 	
-	updateStretchParametersFromPluginParameters(m_ppar);
+	updateStretchParametersFromPluginParameters(m_ppar, m_bbpar);
 
 	m_stretch_source->setOnsetDetection(*getFloatParameter(cpi_onsetdetection));
 	m_stretch_source->setLoopXFadeLength(*getFloatParameter(cpi_loopxfadelen));
@@ -1183,7 +1208,7 @@ void PaulstretchpluginAudioProcessor::processBlock (AudioSampleBuffer& buffer, M
 		m_ppar.pitch_shift.cents += 100.0*note_offset;
 	}
 	
-	m_stretch_source->setProcessParameters(&m_ppar);
+	m_stretch_source->setProcessParameters(&m_ppar, &m_bbpar);
 	AudioSourceChannelInfo aif(buffer);
 	if (isNonRealtime() || m_use_backgroundbuffering == false)
 	{
diff --git a/Source/PluginProcessor.h b/Source/PluginProcessor.h
index 00d572f..48f176c 100644
--- a/Source/PluginProcessor.h
+++ b/Source/PluginProcessor.h
@@ -76,6 +76,10 @@ const int cpi_octaves_ratio7 = 59;
 const int cpi_looping_enabled = 60;
 const int cpi_rewind = 61;
 const int cpi_dryplayrate = 62;
+const int cpi_binauralbeats = 63;
+const int cpi_binauralbeats_mono = 64;
+const int cpi_binauralbeats_freq = 65;
+const int cpi_binauralbeats_mode = 66;
 
 class MyThreadPool : public ThreadPool
 {
@@ -179,6 +183,11 @@ public:
 	{
 		return dynamic_cast<AudioParameterBool*>(getParameters()[index]);
 	}
+    AudioParameterChoice* getChoiceParameter(int index)
+    {
+        return dynamic_cast<AudioParameterChoice*>(getParameters()[index]);
+    }
+
     void setLastPluginBounds(juce::Rectangle<int> bounds) { mPluginWindowWidth = bounds.getWidth(); mPluginWindowHeight = bounds.getHeight();}
     juce::Rectangle<int> getLastPluginBounds() const { return juce::Rectangle<int>(0,0,mPluginWindowWidth, mPluginWindowHeight); }
 
@@ -281,8 +290,9 @@ private:
 	double m_last_in_pos = 0.0;
 	std::vector<int> m_bufamounts{ 4096,8192,16384,32768,65536,262144 };
 	ProcessParameters m_ppar;
-    int mPluginWindowWidth = 820;
-    int mPluginWindowHeight = 710;
+    BinauralBeatsParameters m_bbpar;
+    int mPluginWindowWidth = 810;
+    int mPluginWindowHeight = 745;
 
 	void setFFTSize(float size, bool force=false);
 	void startplay(Range<double> playrange, int numoutchans, int maxBlockSize, String& err);
@@ -297,7 +307,7 @@ private:
 	int m_cur_program = 0;
 	void setParameters(const std::vector<double>& pars);
 	float m_cur_playrangeoffset = 0.0;
-	void updateStretchParametersFromPluginParameters(ProcessParameters& pars);
+	void updateStretchParametersFromPluginParameters(ProcessParameters& pars,BinauralBeatsParameters & bbpar);
 	std::array<AudioParameterBool*, 9> m_sm_enab_pars;
 	bool m_lastrewind = false;
 	AudioFilePreviewComponent* m_previewcomponent = nullptr;