diff --git a/bueno.bat b/bueno.bat
index cd190f0..67fbd6a 100644
--- a/bueno.bat
+++ b/bueno.bat
@@ -1,2 +1,2 @@
 qmake -o build\Makefile .\qtest.pro
-mingw32-make.exe -C .\build -f Makefile.Release
+mingw32-make.exe -C .\build -f Makefile
diff --git a/qtest.pro b/qtest.pro
index abfbb93..511e78a 100644
--- a/qtest.pro
+++ b/qtest.pro
@@ -1,8 +1,12 @@
+QMAKE_CXXFLAGS += --target=x86_64-w64-mingw32 -g -gcodeview 
+#QMAKE_LINK += clang++
+QMAKE_LFLAGS += --target=x86_64-w64-mingw32 -g -gcodeview -Wl,-pdb= -v  
+DEFINES += DEBUG
 CONFIG += debug console
 QT += widgets
 INCLUDEPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
 DESTPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
 VPATH += "$$PWD\src" "$$PWD\src\qt" "$$PWD\src\back" "$$PWD\src\cont"
 SOURCES += qtestmain.cpp qtclasses.cpp backlasses.cpp contclasses.cpp
-HEADERS += qtclasses.h backlasses.h contclasses.h global.h debug.h
+HEADERS += qtclasses.h backlasses.h contclasses.h global.h debug.h backfuncs.h
 #DESTDIR += "build"
diff --git a/src/back/backfuncs.h b/src/back/backfuncs.h
new file mode 100644
index 0000000..06adc7e
--- /dev/null
+++ b/src/back/backfuncs.h
@@ -0,0 +1,33 @@
+GUID NGuidToGUID(NGuid* guid) {
+	GUID msGuid = GUID();
+	msGuid.Data1 = guid->data1;
+	msGuid.Data2 = guid->data2;
+	msGuid.Data3 = guid->data3;
+	msGuid.Data1 = guid->data1;
+	for (int i = 0; i < 8; i++){
+		msGuid.Data4[i] = guid->data4[i];
+		//log_debugcpp("MSGUID DATA4 BYTE " << i << ": ");
+		//log_debugcpp(print_as_binary(8, uint32_t, msGuid.Data4[i]));
+	}
+	//log_debugcpp("MSGUID DATA1: " << msGuid.Data1);
+	//log_debugcpp("MSGUID DATA2: " << msGuid.Data2);
+	//log_debugcpp("MSGUID DATA3: " << msGuid.Data3);
+
+	return msGuid;
+}
+
+NGuid GUIDToNGuid(LPGUID msGuid){
+	NGuid guid = NGuid();
+	guid.data1 = msGuid->Data1;
+	guid.data2 = msGuid->Data2;
+	guid.data3 = msGuid->Data3;
+	for (int i = 0; i < 8; i++){
+		guid.data4[i] = msGuid->Data4[i];
+		//log_debugcpp("GUID DATA4 BYTE " << i << ": ");
+		//log_debugcpp(print_as_binary(8, uint32_t, guid.data4[i]));
+	}
+	//log_debugcpp("GUID DATA1: " << guid.data1);
+	//log_debugcpp("GUID DATA2: " << guid.data2);
+	//log_debugcpp("GUID DATA3: " << guid.data3);
+	return guid;
+}
diff --git a/src/back/backlasses.cpp b/src/back/backlasses.cpp
index acd4f3a..5269c29 100644
--- a/src/back/backlasses.cpp
+++ b/src/back/backlasses.cpp
@@ -1,17 +1,102 @@
 #include <backlasses.h>
+#include <backfuncs.h>
 
-Endpoint::Endpoint(IMMDevice* ep){
+EndpointCallback::EndpointCallback(Endpoint* ep){
+	this->ep = ep;
+}
+
+ULONG EndpointCallback::AddRef(){
+	return InterlockedIncrement(&ref);
+}
+
+ULONG EndpointCallback::Release(){
+	ULONG tempRef = InterlockedDecrement(&ref);
+	if (tempRef == 0) {
+		delete this;
+	}
+	return tempRef;
+}
+
+HRESULT EndpointCallback::QueryInterface(REFIID riid, VOID **ppvInterface) {
+    if (IID_IUnknown == riid)
+    {
+        AddRef();
+        *ppvInterface = (IUnknown*)this;
+    }
+    else if (__uuidof(IAudioEndpointVolumeCallback) == riid)
+    {
+        AddRef();
+        *ppvInterface = (IAudioEndpointVolumeCallback*)this;
+    }
+    else
+    {
+        *ppvInterface = NULL;
+        return E_NOINTERFACE;
+    }
+    return S_OK;
+}
+
+HRESULT EndpointCallback::OnNotify(PAUDIO_VOLUME_NOTIFICATION_DATA pNotify) {
+	if (pNotify == NULL) return E_INVALIDARG;
+
+	float extraChannelVol[pNotify->nChannels];
+	bool multiChannel = false;
+	AUDIO_VOLUME_NOTIFICATION_DATA eventData = *pNotify;
+	if(pNotify->nChannels > 1) {
+		multiChannel = true;
+		for (UINT i = 0; i < pNotify->nChannels; i++){
+			extraChannelVol[i] = pNotify->afChannelVolumes[i];
+		}
+	}
+	NGuid* guid = osh->getGuid();
+    
+	if (memcmp(guid, &eventData, sizeof(*guid)) == 0) {
+		log_debugcpp("Onnanokotify says You Shall Not Update Thy Interface.");
+    } else {
+		log_debugcpp("Onnanokotify says Stored: " << guid->data1);
+		log_debugcpp("Onnanokotify says Grace of God: " << eventData.guidEventContext.Data1);
+		osh->updateMuteCallback(this->ep->getIndex(), eventData.bMuted);
+		osh->updateVolumeCallback(this->ep->getIndex(), AudioChannel::CHANNEL_MAIN ,eventData.fMasterVolume);
+		log_debugcpp("Onnanokotify says Reported Channel Qty: " << eventData.nChannels);
+
+		if(multiChannel) 
+			for(UINT i = 0; i < eventData.nChannels; i++) {
+				osh->updateVolumeCallback(this->ep->getIndex(), (uint32_t)i, extraChannelVol[i]);
+			}
+		else 
+			osh->updateVolumeCallback(this->ep->getIndex(), (uint32_t)0, pNotify->afChannelVolumes[0]);
+	}
+	
+    return S_OK;
+}
+
+/* EndpointCallback::~EndpointCallback(){
+ * 	PAUDIO_VOLUME_NOTIFICATION_DATA->Release();
+ * } */
+
+Endpoint::Endpoint(IMMDevice* ep, uint64_t idx){
 	this->endpoint = ep;
+	this->idx = idx;
 	if(FAILED(endpoint->Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, NULL, (void**)&endpointVolume))) { log_debugcpp("si"); };
+	if (FAILED(endpointVolume->GetChannelCount(&channelCount))) log_debugcpp("get channel count fail");
 	//Obtaining friendly name: IPropertyStore creates PROPVARIANT per field
 	//    hr = endpointPtr->GetId(&endpointID);
 	endpoint->OpenPropertyStore(STGM_READ, 	&properties);
 	PROPVARIANT pv;
 	properties->GetValue(PKEY_Device_FriendlyName , &pv);
-	friendlyName = pv.pwszVal;
+	friendlyName = std::wstring(pv.pwszVal);
 }
 
-LPWSTR Endpoint::getName(){
+void Endpoint::setIndex(uint64_t idx){
+	this->idx = idx;
+}
+
+uint64_t Endpoint::getIndex(){
+	return idx;
+}
+
+
+std::wstring Endpoint::getName(){
 	return friendlyName;
 }
 
@@ -25,6 +110,10 @@ float Endpoint::getVolume(int channel){
 	return volume;
 }
 
+uint32_t Endpoint::getChannelCount(){
+	return (uint32_t)channelCount;
+}
+
 
 bool Endpoint::getMute(){
 	BOOL mut;
@@ -50,34 +139,44 @@ bool Endpoint::getMute(){
  */
 
 
-void Endpoint::setVolume(int channel, float volume) {
-	if (channel == ENDPOINT_MASTER_VOLUME) {
-		if(FAILED(endpointVolume->SetMasterVolumeLevelScalar(volume, NULL))) { log_debugcpp("si");  };
+void Endpoint::setVolume(NGuid* guid, int channel, float volume) {
+	GUID tempMsGuid = NGuidToGUID(guid);
+	if (channel == AudioChannel::CHANNEL_MAIN) {
+		if(FAILED(endpointVolume->SetMasterVolumeLevelScalar(volume, &tempMsGuid))) { log_debugcpp("MASTER VOLUME FAILED");  };
 	} else {
-		if(FAILED(endpointVolume->SetChannelVolumeLevelScalar(channel, volume, NULL))) { log_debugcpp("si");  };
+		log_debugcpp("Windows: Channel being updated: " << channel);
+		if(FAILED(endpointVolume->SetChannelVolumeLevelScalar(channel, volume, &tempMsGuid))) { log_debugcpp("CHANNEL "<< channel <<" VOLUME FAILED");  };
 	}
 }
 
-void Endpoint::setMute() {
-	log_debugcpp("bool mute arrives as " << mut);
-	BOOL mut;
-	if(FAILED(endpointVolume->GetMute(&mut))) { log_debugcpp("si"); }
-	log_debugcpp("translate to BOOL as " << mute);	
-	if(FAILED(endpointVolume->SetMute((mut == false ? 1 : 0), NULL))) { log_debugcpp("si");  };
+void Endpoint::setMute(NGuid* guid, bool muted) {
+	//BOOL mut;
+	//log_debugcpp("bool mute arrives as " << mut);
+	//if(FAILED(endpointVolume->GetMute(&mut))) { log_debugcpp("si"); }
+	//log_debugcpp("translate to BOOL as " << mut);
+	//TODO: use new funcs
+	GUID tempMsGuid = NGuidToGUID(guid);
+	if(FAILED(endpointVolume->SetMute(muted, &tempMsGuid))) { log_debugcpp("MUTE FAILED");  };
 }
 
+void Endpoint::setCallback(EndpointCallback *epc){
+	endpointVolume->RegisterControlChangeNotify((IAudioEndpointVolumeCallback*)epc);
+}
+
+void Endpoint::removeCallback(EndpointCallback *epc){
+	endpointVolume->UnregisterControlChangeNotify((IAudioEndpointVolumeCallback*)epc);
+}
 
 Endpoint::~Endpoint(){
 	log_debugcpp("cum");
-	free(friendlyName);
 	properties->Release();
 	endpointVolume->Release();
 	endpoint->Release();
 }
 
-
-void Overseer::initCOMLibrary(){
-	if(FAILED(CoInitializeEx(NULL, COINIT_APARTMENTTHREADED))) { log_debugcpp("si");  };
+void Overseer::initCOMLibrary() {
+	if(FAILED(CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE))) {
+		log_debugcpp("si");  };
 
 
 	//Retrieving endpoint enumerator
@@ -87,6 +186,11 @@ void Overseer::initCOMLibrary(){
 								(void**)&deviceEnumerator)) )
 		{ log_debugcpp("si"); };
 
+	GUID tempGuid;
+	if(FAILED(CoCreateGuid(&tempGuid))) { log_debugcpp("Failed to obtain GUID: " ); };
+	this->guid = GUIDToNGuid(&tempGuid);
+	//TODO: Release lpguid?
+	//TODO: Uninitialize COM
 }
 
 void Overseer::reloadEndpoints() {
@@ -105,7 +209,8 @@ void Overseer::reloadEndpoints() {
 	for (unsigned int i = 0; i < numPlaybackEndpoints; i++){
 		IMMDevice *temp;
 		if(deviceCollection->Item(i, &temp) != 0) { log_debugcpp("si"); };
-		Endpoint *endpoint = new Endpoint(temp);
+		Endpoint *endpoint = new Endpoint(temp, i);
+		//endpoint->setIndex(i);
 		this->playbackDevices.push_back(endpoint);
 		//TODO: le porblemx	std::cout << "ola" << std::endl;
 	}
@@ -115,6 +220,7 @@ void Overseer::reloadEndpoints() {
 
 Overseer::Overseer(){
 	//Initializing COM library
+	log_debugcpp("Initializing Overseer");
 	initCOMLibrary();
 	
 	//Obtaining playback endpoint collection on this point in time
@@ -129,6 +235,11 @@ Overseer::Overseer(){
 
 //int Overseer::getDefaultCaptureEndpoint(Endpoint** defaultEndpoint);
 
+//TODO guid
+NGuid* Overseer::getGuid() {	
+	return &guid;
+}
+ 
 std::vector<Endpoint*> Overseer::getPlaybackEndpoints() {
 	return playbackDevices;
 }
diff --git a/src/back/backlasses.h b/src/back/backlasses.h
index ebfe0e5..0e816a8 100644
--- a/src/back/backlasses.h
+++ b/src/back/backlasses.h
@@ -1,10 +1,11 @@
 #pragma once
 #define WIN32_LEAN_AND_MEAN
+//done by qt by def #define UNICODE
 
-#include "debug.h"
-#include "global.h"
-#include <vector>
-#include <iostream>
+//#include "debug.h"
+/* #include <vector> */
+/* #include <iostream> */
+/* #include <wstring> */
 
 #include <Windows.h>
 #include <mmdeviceapi.h>
@@ -19,33 +20,60 @@
 //#include <comip.h>
 #include <Winerror.h>
 
+#include "global.h"
+#include "contclasses.h"
+
+class EndpointCallback;
+
 class Endpoint {
 	
  public:
-	Endpoint(IMMDevice* endpoint);
-	void setVolume(int channel, float volume);
-	/* float getLeftChannelVolume(); */
-	/* float getRightChannelVolume(); */
+	Endpoint(IMMDevice* endpoint, uint64_t idx);
+	uint64_t getIndex();
+	void setIndex(uint64_t idx);
+	void setVolume(NGuid* guid, int channel, float volume);
+	uint32_t getChannelCount();
 	float getVolume(int channel);
-	void setMute();
+	void setMute(NGuid* guid, bool muted);
 	bool getMute();
-	LPWSTR getName();
+	std::wstring getName();
+	void setCallback(EndpointCallback *epc);
+	void removeCallback(EndpointCallback *epc);
 	~Endpoint();
 	
  private:
+	uint32_t channelCount;
 	IMMDevice* endpoint;
 	IAudioEndpointVolume *endpointVolume ;
 	IPropertyStore *properties;
-	LPWSTR friendlyName;
+	std::wstring friendlyName;
+	uint64_t idx;
 	//    LPWSTR endpointID = NULL;
 };
 
+class EndpointCallback : public IAudioEndpointVolumeCallback {
+ 	
+ public:
+	EndpointCallback(Endpoint* ep);
+	
+	ULONG AddRef();
+	ULONG Release();
+    HRESULT QueryInterface(REFIID riid, VOID **ppvInterface);
+	HRESULT OnNotify(PAUDIO_VOLUME_NOTIFICATION_DATA update);
+	//~EndpointCallback();
+
+ private:
+	ULONG ref = 1;
+	Endpoint* ep;
+};
+
 class Overseer {
 	//TODO singleton?
  public:
 	Overseer();
 	std::vector<Endpoint*> getPlaybackEndpoints();
 	void reloadEndpoints();
+	NGuid* getGuid();
 	//~Overseer();
 	//int getDefaultPlaybackEndpoint(Endpoint** defaultEndpoint);
 	//int getDefaultCaptureEndpoint(Endpoint** defaultEndpoint);
@@ -54,6 +82,7 @@ class Overseer {
 	~Overseer();
 	
  private:
+	NGuid guid;
 	unsigned int numPlaybackEndpoints;
 	IMMDeviceEnumerator *deviceEnumerator;
 	std::vector<Endpoint*> playbackDevices;
diff --git a/src/cont/contclasses.cpp b/src/cont/contclasses.cpp
index bd05f88..381550b 100644
--- a/src/cont/contclasses.cpp
+++ b/src/cont/contclasses.cpp
@@ -1,50 +1,138 @@
+#include "backlasses.h"
 #include "contclasses.h"
+//TODO: pragma once
 
+//TODO: ?????
 Overseer OverseerHandler::os;
 
-EndpointHandler::EndpointHandler(Endpoint *ept, QObject *parent) : QObject(parent) {
-	this->ept = ept;
-	eptName = QString::fromStdWString(ept->getName()); 
+EndpointHandler::EndpointHandler(uint64_t idx) {
+	//std::vector<Endpoint*> endpoints = osh->getPlaybackEndpoints().at(idx);
+	this->ep = osh->getPlaybackEndpoints().at(idx);
+	epc = new EndpointCallback(ep);
+	//epName = ep->getName();
+	ep->setCallback(epc);
 }
+
+uint32_t EndpointHandler::getChannelCount(){
+	return ep->getChannelCount();
+}
+
+void EndpointHandler::setIndex(uint64_t idx){
+	this->idx = idx;
+}
+
+uint64_t EndpointHandler::getIndex(){
+	return idx;
+}
+
 /*
  * -1 for master volume
  */
-void EndpointHandler::setValue(int channel, int value){
+void EndpointHandler::setVolume(NGuid* guid, int channel, int value){
 	if (channel == ENDPOINT_MASTER_VOLUME)
-		ept->setVolume(channel, (float)value / 100);
-	else ept->setVolume(channel, (float)value / 100);
+		ep->setVolume(guid, channel, (float)value / 100);
+	else ep->setVolume(guid, channel, (float)value / 100);
 }
 
-void EndpointHandler::setMute(){
+void EndpointHandler::setMute(NGuid* guid, bool muted){
 	//Qt momento, de ahi el param?
 	log_debugcpp("kinda handling the muting tbh");
-	ept->setMute();
+	ep->setMute(guid, muted);
 }
 
-QString EndpointHandler::getName(){
-	return eptName;
+std::wstring EndpointHandler::getName(){
+	return ep->getName();
 }
 
 float EndpointHandler::getVolume(int channel){
-    return ept->getVolume(channel);
+    return ep->getVolume(channel);
 }
 
 bool EndpointHandler::getMute(){
-    return ept->getMute();
+    return ep->getMute();
 }
 
-Overseer* OverseerHandler::getOverseer(){
-	return &os;
+EndpointHandler::~EndpointHandler() {
+	ep->removeCallback(epc);
+	epc->Release();
+	delete ep;
 }
 
-OverseerHandler::OverseerHandler(QObject *parent) : QObject(parent) {
-	
+std::vector<Endpoint*> OverseerHandler::getPlaybackEndpoints() {
+	return this->os.getPlaybackEndpoints();
 }
 
-std::vector<EndpointHandler*>* OverseerHandler::getEndpointHandlers(){
+
+std::vector<EndpointHandler*> OverseerHandler::getEndpointHandlers(){
 	return endpointHandlers;
 }
 
-void OverseerHandler::setEndpointHandlers(std::vector<EndpointHandler*> *ephs){
+uint64_t OverseerHandler::getPlaybackEndpointsCount(){
+	return this->os.getPlaybackEndpoints().size();
+}
+
+void OverseerHandler::reloadEndpointHandlers(){
+	//std::vector<EndpointHandler*>* ephs = new std::vector<EndpointHandler*>;
+	log_debugcpp(" VSize: " << this->getPlaybackEndpointsCount());
+	
+	for(uint64_t i = 0; i < this->getPlaybackEndpointsCount(); i++){
+		log_debugcpp("Creating handler " << i);
+		
+		if(i < (this->endpointHandlers.size()) && 
+		   this->endpointHandlers.at(i) != nullptr)
+			delete endpointHandlers.at(i);
+		
+		EndpointHandler* eph = new EndpointHandler(i);
+		log_debugcpp("Created handler " << i << ", adding to vector. " << " VSize: " << this->getPlaybackEndpointsCount());
+		
+		if (i >= this->endpointHandlers.size())
+			endpointHandlers.push_back(eph);
+		else endpointHandlers.at(i) = eph;
+	}
+	//setEndpointHandlers(ephs);
+}
+
+NGuid* OverseerHandler::getGuid() {
+	return this->os.getGuid();
+}
+
+void OverseerHandler::setEndpointHandlers(std::vector<EndpointHandler*> ephs){
 	this->endpointHandlers = ephs;
 }
+
+void OverseerHandler::setFrontVolumeCallback(std::function<void(uint64_t, uint32_t, float)> f) {
+	this->updateFrontVolumeCallback = f;
+}
+
+void OverseerHandler::setFrontMuteCallback(std::function<void(uint64_t, bool)> f) {
+	this->updateFrontMuteCallback = f;
+}
+
+void OverseerHandler::updateMuteCallback(uint64_t idx, bool muted){
+	updateFrontMuteCallback(idx, muted);
+}
+
+/*
+ * void OverseerHandler::updateMainVolumeCallback(uint64_t idx, float newVal){
+ * 	
+ * }
+ */
+
+void OverseerHandler::updateVolumeCallback(uint64_t idx, uint32_t channel, float newVal){
+	if (channel == (uint32_t)AudioChannel::CHANNEL_MAIN) {
+		log_debugcpp("mainvolcallback float: " << newVal);
+		updateFrontVolumeCallback(idx, AudioChannel::CHANNEL_MAIN, newVal);
+		return;
+	}
+		
+	
+	// convert channel to bitmask
+	uint32_t i = 0;
+	while (i < channel)
+		i++;
+	uint32_t mask = (1 << i);
+
+	log_debugcpp("Back->Cont Channel: " << mask << " volcallback float: " << newVal);
+	
+	updateFrontVolumeCallback(idx, mask, newVal);
+}
diff --git a/src/cont/contclasses.h b/src/cont/contclasses.h
index c562b73..320564f 100644
--- a/src/cont/contclasses.h
+++ b/src/cont/contclasses.h
@@ -1,48 +1,84 @@
 #pragma once
-#include <QObject>
-#include "backlasses.h"
+#define invoke_mem_fn(object,ptrToMember)  ((object).*(ptrToMember))
+#define pinvoke_mem_fn(object,ptrToMember)  ((object)->*(ptrToMember))
 
+/* #ifndef QTBLESSED */
+/* //#define Q_OBJECT */
+/* class QWidget{}; */
+/* class QMainWindow{}; */
+/* #endif */
 
-class EndpointHandler : public QObject {
-	Q_OBJECT
+class EndpointWidget; 
+class Endpoint;
+class EndpointCallback;
+class Overseer;
 
+enum AudioChannel {
+	CHANNEL_LEFT  = (1 << 0),
+	CHANNEL_RIGHT = (1 << 1),
+	CHANNEL_MAIN  = ~0,
+};
+
+struct NGuid {
+  uint32_t data1;
+  uint16_t data2;
+  uint16_t data3;
+  unsigned char data4[8];
+};
+
+class EndpointHandler {
+	
 public:
-	EndpointHandler(Endpoint *ept, QObject *parent = nullptr);
-	QString getName();
+	EndpointHandler(uint64_t idx);
+	//TODO: get();
+	Endpoint *ep = nullptr;
+	EndpointCallback *epc = nullptr;
+	//std::wstring epName;
+
+	uint32_t getChannelCount();
+	
+	void setIndex(uint64_t idx);
+	uint64_t getIndex();
+	void setVolume(int channel, float volume);
+	
+	std::wstring getName();
 	float getVolume(int channel);
 	bool getMute();
-	
-private:
-	Endpoint *ept;
-	QString eptName;
-	//QSlider *slidy;
 
-public slots:
-	void setValue(int channel, int value);
-	void setMute();
+	void setVolume(NGuid* guid, int channel, int value);
+	void setMute(NGuid* guid, bool muted);
+
+	~EndpointHandler();
+private:
+	uint64_t idx;
+    //QSlider *slidy;
+
 //signals: 
 
 
 };
 
 
-class OverseerHandler : public QObject {
-	Q_OBJECT
+class OverseerHandler {
 
 public:
-	OverseerHandler(QObject *parent = nullptr);
-	void setEndpointHandlers(std::vector<EndpointHandler*> *ephs);
-	std::vector<EndpointHandler*>* getEndpointHandlers();
-	static Overseer* getOverseer();
+	//OverseerHandler();
+	void setEndpointHandlers(std::vector<EndpointHandler*> ephs);
+	std::vector<EndpointHandler*> getEndpointHandlers();
+	std::vector<Endpoint*> getPlaybackEndpoints();
+	uint64_t getPlaybackEndpointsCount();
+	void reloadEndpointHandlers();
+	NGuid* getGuid();
+	void updateMuteCallback(uint64_t idx, bool muted);
+	void setFrontMuteCallback(std::function<void(uint64_t, bool)> f);
+	void setFrontVolumeCallback(std::function<void(uint64_t, uint32_t, float)> f);
+	//void updateMainVolumeCallback(uint64_t idx, float newVal);
+	void updateVolumeCallback(uint64_t idx, uint32_t channel, float newVal);
 	
 private:
     static Overseer os;
-	std::vector<EndpointHandler*> *endpointHandlers;
-	//QSlider *slidy;
-
-	//public slots:
-	//void setValue(int value);
-
-
-
+	std::vector<EndpointHandler*> endpointHandlers;
+	std::function<void(uint64_t /* device */, uint32_t /* channel */, float /* value */)> updateFrontVolumeCallback;
+	std::function<void(uint64_t /* device */, bool /* mute */)> updateFrontMuteCallback;
+	
 };
diff --git a/src/debug.h b/src/debug.h
index f91232b..e80893f 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -2,9 +2,28 @@
 
 #if defined (QT_DEBUG) || defined (DEBUG) || defined (_DEBUG)
 
+template<size_t Y, typename T> 
+std::bitset<Y> varToBitset(T info) {
+        std::bitset<Y> content(info);  
+        return content;  
+} 
+
 #define log_debugcpp(str) do {											\
 	 std::cout << "[DEBUG]" << "(" << __FILE__ << ":" << __LINE__ << "): " << str << std::endl; \
 	} while (0)
+
+#define print_as_binary(len, type, info)  varToBitset<len, type>(info)
+
 #else 
-#define log_debugcpp(str) 
+#define log_debugcpp(str)
+#define print_as_binary(len, type, info)
 #endif
+
+/* Here as a quick reference, in case smthn similar is needed again */
+/* typedef void (EndpointWidget::*epwMuteFunc)(bool muted); */
+/* typedef void (EndpointWidget::*epwMainVolumeFunc)(float newValue); */
+/* typedef void (EndpointWidget::*epwChannelVolumeFunc)(uint32_t channel, float newValue); */
+/* typedef void (EndpointWidget::*epwToggleFrontFunc)(bool active); */
+
+
+
diff --git a/src/global.h b/src/global.h
index 96d177b..c4cf2af 100644
--- a/src/global.h
+++ b/src/global.h
@@ -1,15 +1,20 @@
 #pragma once
 
-//TODO enum capullo
+#include <vector>
+#include <iostream>
+#include <string>
+#include <bitset>
+
+#include "debug.h"
+
 #define ENDPOINT_MASTER_VOLUME -1
-#define ENDPOINT_LEFT_CHANNEL_VOLUME 0
-#define ENDPOINT_RIGHT_CHANNEL_VOLUME 1
+/* #define ENDPOINT_LEFT_CHANNEL_VOLUME 0 */
+/* #define ENDPOINT_RIGHT_CHANNEL_VOLUME 1 */
 
 #define STRING_MUTE "Mute"
 #define STRING_UNMUTE "Unmute"
 //INIT BACK
 
-
 class OverseerHandler;
 extern OverseerHandler *osh;
 
diff --git a/src/qt/qtclasses.cpp b/src/qt/qtclasses.cpp
index 0cac13d..155cd90 100644
--- a/src/qt/qtclasses.cpp
+++ b/src/qt/qtclasses.cpp
@@ -1,5 +1,20 @@
 #include "qtclasses.h"
 
+/*
+ * ToggleButton::ToggleButton(QWidget *parent) : QAbstractButton(parent) {
+ * 	this->setCheckable(true);
+ * }
+ * 
+ * ToggleButton::~ToggleButton(){
+ * 
+ * }
+ * 
+ * void ToggleButton::checkStateSet(){ }
+ * 
+ * bool 	hitButton(const QPoint &pos) {
+ * 	
+ * }
+ */
 
 EndpointWidget::EndpointWidget(EndpointHandler* eph, QWidget *parent) : QWidget(parent){
 	this->eph = eph;
@@ -8,36 +23,21 @@ EndpointWidget::EndpointWidget(EndpointHandler* eph, QWidget *parent) : QWidget(
 	log_debugcpp("olaW");
 	if (parent == nullptr) { log_debugcpp("owo?"); }
 
-	muteButton = new QPushButton();
-	mainLabel = new QLabel(eph->getName());
-	leftChannelLabel = new QLabel("88");
-	rightChannelLabel = new QLabel("77");
+	muteButton = new QCheckBox();
+	mainLabel = new QLabel(QString::fromStdWString(eph->getName()));
 	mainSlider = new QSlider(Qt::Horizontal);
-	leftChannelSlider = new QSlider(Qt::Horizontal);
-	rightChannelSlider = new QSlider(Qt::Horizontal);
-
-	muteButton->setStyleSheet("background-color: #A3C1DA; color: red");
+	
+	//muteButton->setStyleSheet("background-color: #A3C1DA; color: red");
 	mainSlider->setFocusPolicy(Qt::StrongFocus);
 	mainSlider->setTickPosition(QSlider::TicksBothSides);
 	mainSlider->setTickInterval(5);
 	mainSlider->setSingleStep(1);
 	mainSlider->setRange(0,100);
-	leftChannelSlider->setTickInterval(5);
-	leftChannelSlider->setSingleStep(1);
-	leftChannelSlider->setRange(0,100);
-	rightChannelSlider->setTickInterval(5);
-	rightChannelSlider->setSingleStep(1);
-	rightChannelSlider->setRange(0,100);
 
+	muteButton->setCheckState((eph->getMute()  == false ? Qt::Unchecked : Qt::Checked));
 	muteButton->setText(eph->getMute() ? STRING_UNMUTE : STRING_MUTE);
 	float volume = eph->getVolume(ENDPOINT_MASTER_VOLUME) * 100;
 	mainSlider->setValue((int)volume);
-	volume = eph->getVolume(ENDPOINT_LEFT_CHANNEL_VOLUME) * 100;
-	leftChannelSlider->setValue((int)volume);
-	leftChannelLabel->setText(QString::number(volume));
-	volume = eph->getVolume(ENDPOINT_RIGHT_CHANNEL_VOLUME) * 100;
-	rightChannelSlider->setValue((int)volume);
-	rightChannelLabel->setText(QString::number(volume));
 	log_debugcpp("ENDPOINT SET WITH VOLUME " << volume);
 
 	mainMuteLayout = new QGridLayout();
@@ -45,25 +45,108 @@ EndpointWidget::EndpointWidget(EndpointHandler* eph, QWidget *parent) : QWidget(
 	mainMuteLayout->addWidget(mainLabel, 0, 0);
 	mainMuteLayout->addWidget(muteButton, 0, 1);
 	layout->addWidget(mainSlider, 0, 1);
-	layout->addWidget(leftChannelSlider, 1, 0);
-	layout->addWidget(leftChannelLabel, 2, 0);
-	layout->addWidget(rightChannelSlider, 1, 1);
-	layout->addWidget(rightChannelLabel, 2, 1);
+	
+	connect<void(QSlider::*)(int), void(EndpointWidget::*)(int)>(mainSlider, &QSlider::valueChanged, this,&EndpointWidget::updateMainVolume);
+	connect<void(QCheckBox::*)(int), void(EndpointWidget::*)(int)>(muteButton, &QCheckBox::stateChanged, this, (&EndpointWidget::updateMute));
+	
+	for(uint32_t i = 0; i < eph->getChannelCount(); i++){
+		QSlider* tmp = new QSlider(Qt::Horizontal);
+		QLabel* tmpLb = new QLabel("");
+		tmp->setTickInterval(5);
+		tmp->setSingleStep(1);
+		tmp->setRange(0,100);
+		volume = eph->getVolume(i) * 100;
+		tmp->setValue((int) volume);
+		tmpLb->setText(QString::number(volume));
+		this->channelSliders.push_back(tmp);
+		this->channelLabels.push_back(tmpLb);
+		layout->addWidget(tmp, 1, i);
+		layout->addWidget(tmpLb, 2, i);
+		//TODO: check if there's a need to prevent deadlocks; probably this will eventually turn into its own func 
+		connect(tmp, &QSlider::valueChanged, [this, i](int newValue){ this->eph->setVolume(osh->getGuid(), i, newValue); this->channelLabels.at(i)->setText(QString::number(newValue)); });
+	}
+	
 	layout->addItem(new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding), 3, 0);
 	layout->addItem(new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding), 3, 1);
-	
-	/*
-	 * connect(mainSlider, &QSlider::valueChanged, eph, &EndpointHandler::setValue);
-	 */
-	connect(mainSlider, &QSlider::valueChanged, [this](int newValue){this->eph->setValue(ENDPOINT_MASTER_VOLUME, newValue); });
-	connect(leftChannelSlider, &QSlider::valueChanged, [this](int newValue){ this->eph->setValue(ENDPOINT_LEFT_CHANNEL_VOLUME, newValue); this->leftChannelLabel->setText(QString::number(newValue)); });
-	connect(rightChannelSlider, &QSlider::valueChanged, [this](int newValue){ this->eph->setValue(ENDPOINT_RIGHT_CHANNEL_VOLUME, newValue); this->rightChannelLabel->setText(QString::number(newValue)); });
-	connect(muteButton, &QPushButton::clicked, [this](bool clicked){ log_debugcpp("cliqui" << clicked << "cloqui"); this->eph->setMute(); this->muteButton->setText(this->eph->getMute() ? STRING_UNMUTE : STRING_MUTE); });
 	log_debugcpp("ENDPOINT_WIDGETED");
 }
 
+void EndpointWidget::updateMute(bool muted){
+	log_debugcpp("cliqui callboqui cloqui");
+	//TIP: Blocksignals here to diagnose slider visuals locking when playing DJ with external volume bar. Functionality is restored when mute checkbox is clicked.
+	//this->blockSignals(true);	
+	//this->muteButton->blockSignals(true);
+	
+	//this->eph->setMute(osh->getGuid(), muted);
+	this->muteButton->setChecked(muted);
+	this->muteButton->setText(this->eph->getMute() ? STRING_UNMUTE : STRING_MUTE);
+	//this->muteButton->blockSignals(false);
+	//this->blockSignals(false);	
+}
 
-MainWindow::MainWindow(std::vector<EndpointHandler*> *ephs, QWidget *parent) : QMainWindow(parent)  {
+void EndpointWidget::updateMute(int checked){
+	log_debugcpp("cliqui slOtty cloqui");
+	bool muted = (checked == 2 ? true : false);
+	log_debugcpp("int: " << checked << " bool: " << muted);
+	this->eph->setMute(osh->getGuid(), muted);
+	//this->muteButton->setCheckState();
+	this->muteButton->setText(this->eph->getMute() ? STRING_UNMUTE : STRING_MUTE); 
+}
+
+void EndpointWidget::updateMainVolume(int newValue){
+	log_debugcpp("updateMainVolume slot.");
+	this->eph->setVolume(osh->getGuid(), ENDPOINT_MASTER_VOLUME, newValue);
+}
+
+void EndpointWidget::updateVolume(uint32_t channel, float newValue){
+	//this->blockSignals(true);
+	int newVal = newValue * 100;
+	if (channel == (uint32_t)AudioChannel::CHANNEL_MAIN) {
+		log_debugcpp("mainvolcallback int: " << newVal);
+		//this->mainSlider->blockSignals(true);
+	
+		if(this->mainSlider->value() != newVal) {
+			this->mainSlider->setValue(newVal);
+		}
+		return;
+	}
+		
+	log_debugcpp("Cont->Front Channel:: " << channel << " volcallback int: " << newVal);
+
+	for (size_t i = 0; i < sizeof(uint32_t) * 8 && i < channelSliders.size(); ++i) {
+		if (((channel >> i) & 1) && this->channelSliders.at(i)->value() != newVal) {
+			//this->channelSliders.at(i)->blockSignals(true);
+			
+			this->channelSliders.at(i)->setValue(newVal);
+			this->channelLabels.at(i)->setText(QString::number((int)(newValue * 100)));
+			
+			//this->channelSliders.at(i)->blockSignals(false);
+		}
+	}
+
+	//this->blockSignals(false);
+}
+
+/*
+ * void EndpointWidget::toggleFrontEvents(bool active){
+ * 	this->muteButton->blockSignals(active);
+ * 	this->mainSlider->blockSignals(active);
+ * 	for(uint32_t i = 0; i < this->channelSliders.size(); i++){
+ * 		this->channelSliders.at(i)->blockSignals(active);
+ * 	}
+ * }
+ */
+
+
+void EndpointWidget::setIndex(uint64_t idx){
+	this->idx = idx;
+}
+
+uint64_t EndpointWidget::getIndex(){
+	return idx;
+}
+
+MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)  {
 	// setWindowState(Qt::WindowFullScreen);
 	//	setCentralWidget(centralWidget);
 	widget = new QWidget();
@@ -74,27 +157,31 @@ MainWindow::MainWindow(std::vector<EndpointHandler*> *ephs, QWidget *parent) : Q
 	//layout->addWidget(pintas, 0, 0);
 
 	setWindowTitle("slidea resbala nu c");
+	
+	reloadEndpointWidgets();
+}
 
-	/*s
-	 * setEndpointHandlers(ephs);
-	 */
+void MainWindow::reloadEndpointWidgets() {
 	unsigned int i = 0;
-	for (; i < ephs->size(); i++) {
+	for (; i < (osh->getEndpointHandlers().size()); i++) {
 		log_debugcpp("EPWidget creation");
-		EndpointWidget *epw = new EndpointWidget(ephs->at(i), widget);
+		EndpointWidget *epw = new EndpointWidget(osh->getEndpointHandlers().at(i), widget);
 		ews.push_back(epw);
 		layout->addWidget(epw, i, 0);
 	}
+
 	layout->addItem(new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding), i, 0);
+	
+	osh->setFrontVolumeCallback([this](uint64_t device, uint32_t channel, float value) {
+		if (device < ews.size())
+			ews[device]->updateVolume(channel, value);
+	});
+	osh->setFrontMuteCallback([this](uint64_t device, bool muted) {
+		if (device < ews.size())
+			ews[device]->updateMute(muted);
+	});
 }
 
-/*
- * void MainWindow::setEndpointHandlers(std::vector<EndpointHandler*> *ephs){
- * 	this->ephs = ephs;
- */
-
-
-
 /*
    * void MainWindow::setPlotButton() {
    *     button = new QPushButton("push"),
@@ -112,3 +199,4 @@ MainWindow::MainWindow(std::vector<EndpointHandler*> *ephs, QWidget *parent) : Q
    * ...
    */
 
+
diff --git a/src/qt/qtclasses.h b/src/qt/qtclasses.h
index a02bff8..c5eee14 100644
--- a/src/qt/qtclasses.h
+++ b/src/qt/qtclasses.h
@@ -1,54 +1,104 @@
 #pragma once
+
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
 
-#include <vector>
 #include <QMainWindow>
 #include <QApplication>
 #include <QLabel>
 #include <QSlider>
 #include <QGridLayout>
 #include <QPushButton>
-#include "contclasses.h"
-//#include <Q>
-//#include <QWidgets>
+#include <QCheckBox>
+/*
+ * #else
+ * class QSlider;
+ * class QLabel;
+ * class QGridLayout;
+ * class QPushButton;
+ * class QWidget;
+ * class QMainWindow;
+ * #endif
+ */
 
+#include "global.h"
+#include "contclasses.h"
+//class EndpointHandler;
+
+/*
+ * class ToggleButton : public QAbstractButton {
+ * 	Q_OBJECT
+ * 
+ * public:
+ * 	ToggleButton(QWidget *parent = nullptr);
+ * 	void 	checkStateSet();
+ * 	bool 	hitButton(const QPoint &pos) const;
+ * 	void 	nextCheckState();
+ * 	void 	changeEvent(QEvent *e) override;
+ * 	bool 	event(QEvent *e) override;
+ * 	void 	focusInEvent(QFocusEvent *e) override;
+ * 	void 	focusOutEvent(QFocusEvent *e) override;
+ * 	void 	keyPressEvent(QKeyEvent *e) override;
+ * 	void 	keyReleaseEvent(QKeyEvent *e) override;
+ * 	void 	mouseMoveEvent(QMouseEvent *e) override;
+ * 	void 	mousePressEvent(QMouseEvent *e) override;
+ * 	void 	mouseReleaseEvent(QMouseEvent *e) override;
+ * 	void 	paintEvent(QPaintEvent *e) override = 0;
+ * 	void 	timerEvent(QTimerEvent *e) override;
+ * 	ToggleButton(QWidget *parent = nullptr);
+ * };
+ */
 
 class EndpointWidget : public QWidget {
 	Q_OBJECT
 	  	  
 public:
 	EndpointWidget(EndpointHandler* eph, QWidget *parent = nullptr);
-	//void populateEndpointWidget(EndpointHandler *eph);
-	//void setEndpointHandlers(std::vector<EndpointHandler*> *ephs);
-	
-private:
+	//TODO: get();
 	EndpointHandler* eph;
-	QPushButton *muteButton = nullptr; 
+	void setIndex(uint64_t idx);
+	uint64_t getIndex();
+	
+	void setVolume(int channel, float volume);
+	
+	QCheckBox *muteButton = nullptr; 
 	QLabel *mainLabel = nullptr, *leftChannelLabel = nullptr, *rightChannelLabel = nullptr;
 	QSlider *mainSlider = nullptr;
-	QSlider *leftChannelSlider = nullptr;
-	QSlider *rightChannelSlider = nullptr;
+	std::vector<QSlider*> channelSliders;
+	std::vector<QLabel*> channelLabels;
 	QGridLayout *layout = nullptr;
 	QGridLayout *mainMuteLayout = nullptr;
+	//void updateMainVolume(float newValue);
+	void updateVolume(uint32_t channel, float newValue);
+	void updateMute(bool muted);
+	//void toggleFrontEvents(bool active);
+	
+	//void populateEndpointWidget(EndpointHandler *eph);
+	//void setEndpointHandlers(std::vector<EndpointHandler*> *ephs);
+							   
+public slots:
+	void updateMainVolume(int newValue);
+	void updateMute(int checked);
+	
+private:
+	uint64_t idx;
 	//std::vector<EndpointHandler*> *ephs;
 	//std::vector<QSlider> *sliders;
-
-	//public slots:
-	//	void setEndpointHandlers(std::vector<EndpointHandler*> *ephs);
 	
 	//signals:
     //void valueChanged(int value);
 
 };
 
-
 class MainWindow : public QMainWindow {
 	Q_OBJECT
 	//QWidget *centralWidget;
 	  	  
 public:
-	MainWindow(std::vector<EndpointHandler*> *ephs, QWidget *parent = nullptr);
+	MainWindow(QWidget *parent = nullptr);
+	void reloadEndpointWidgets();
+
+	//TODO: destroy/empty existing EndpointWidgets
 	//void setEndpointHandlers(std::vector<EndpointHandler*> *ephs);
 
 private:
diff --git a/src/qtestmain.cpp b/src/qtestmain.cpp
index 883d7e7..15d18fc 100644
--- a/src/qtestmain.cpp
+++ b/src/qtestmain.cpp
@@ -1,14 +1,15 @@
-#include <iostream>
-#include <vector>
-
 //#include <stdio.h>
 //#include <stdlib.h>
 
 //#include <qapplicationstatic.h> 
+
+//#define QTBLESSED
 #include <QApplication>
 #include <QMainWindow> 
 
+//#include "contclasses.h"
 #include "qtclasses.h"
+#include "global.h"
 
 OverseerHandler *osh = new OverseerHandler();
 	
@@ -21,19 +22,16 @@ QApplication* createApplication(int &argc, char *argv[])
 int main (int argc, char* argv[]) {
 	//QApplication::setStyle("windowsvista");
 	//INIT CONT
-	std::vector<Endpoint*> epts = OverseerHandler::getOverseer()->getPlaybackEndpoints();
-	std::vector<EndpointHandler*>* ephs = new std::vector<EndpointHandler*>;
-	for(unsigned int i = 0; i < epts.size(); i++){
-		EndpointHandler *eph = new EndpointHandler(epts.at(i));
-		ephs->push_back(eph);
-	}
+	log_debugcpp("main init");
+	osh->reloadEndpointHandlers();
+	log_debugcpp("Reloaded endpoint handlers");
 	
-	osh->setEndpointHandlers(ephs);
 	//INIT FRONT
 	QScopedPointer<QApplication> app(createApplication(argc, argv));
-	MainWindow window = MainWindow(ephs);
+	MainWindow window = MainWindow();
 	//window.setEndpointHandlers(ephs);
 	app->setStyle("windowsvista");
 	window.show();
 	return app->exec();	
 }
+