diff --git a/audio/drain/Algo.cpp b/audio/drain/Algo.cpp
index ac599dd..dd8b2c2 100644
--- a/audio/drain/Algo.cpp
+++ b/audio/drain/Algo.cpp
@@ -117,7 +117,7 @@ void audio::drain::Algo::setStatusFunction(algoStatusFunction _newFunction) {
 }
 
 void audio::drain::Algo::generateStatus(const etk::String& _status) {
-	if (m_statusFunction != nullptr) {
+	if (m_statusFunction != null) {
 		if (m_name.size() == 0) {
 			m_statusFunction(m_type, _status);
 		} else {
diff --git a/audio/drain/ChannelReorder.cpp b/audio/drain/ChannelReorder.cpp
index 5d59d2f..144b2bb 100644
--- a/audio/drain/ChannelReorder.cpp
+++ b/audio/drain/ChannelReorder.cpp
@@ -56,7 +56,7 @@ bool audio::drain::ChannelReorder::process(audio::Time& _time,
 		_output = _input;
 		return true;
 	}
-	if (_input == nullptr) {
+	if (_input == null) {
 		_output = &(m_outputData[0]);
 		_outputNbChunk = 0;
 		DRAIN_ERROR("null pointer input ... ");
diff --git a/audio/drain/CircularBuffer.cpp b/audio/drain/CircularBuffer.cpp
index 9b5e1ca..0913a52 100644
--- a/audio/drain/CircularBuffer.cpp
+++ b/audio/drain/CircularBuffer.cpp
@@ -9,8 +9,8 @@
 
 audio::drain::CircularBuffer::CircularBuffer(const audio::drain::CircularBuffer& _obj) :
   m_data(),
-  m_write(nullptr),
-  m_read(nullptr),
+  m_write(null),
+  m_read(null),
   m_timeRead(),
   m_capacity(0),
   m_sizeChunk(0),
@@ -27,8 +27,8 @@ audio::drain::CircularBuffer& audio::drain::CircularBuffer::operator=(const audi
 
 audio::drain::CircularBuffer::CircularBuffer() :
   m_data(),
-  m_write(nullptr),
-  m_read(nullptr),
+  m_write(null),
+  m_read(null),
   m_timeRead(),
   m_capacity(0),
   m_sizeChunk(0),
@@ -38,8 +38,8 @@ audio::drain::CircularBuffer::CircularBuffer() :
 
 audio::drain::CircularBuffer::~CircularBuffer() {
 	m_data.clear();
-	m_read = nullptr;
-	m_write = nullptr;
+	m_read = null;
+	m_write = null;
 }
 
 void audio::drain::CircularBuffer::setCapacity(size_t _capacity, size_t _chunkSize, uint32_t _frequency) {
@@ -58,8 +58,8 @@ void audio::drain::CircularBuffer::setCapacity(size_t _capacity, size_t _chunkSi
 		_chunkSize = 8;
 	}
 	m_data.clear();
-	m_write = nullptr;
-	m_read = nullptr;
+	m_write = null;
+	m_read = null;
 	m_frequency = _frequency;
 	m_capacity = _capacity;
 	m_sizeChunk = _chunkSize;
diff --git a/audio/drain/EndPointCallback.cpp b/audio/drain/EndPointCallback.cpp
index 86376df..ab9b624 100644
--- a/audio/drain/EndPointCallback.cpp
+++ b/audio/drain/EndPointCallback.cpp
@@ -9,8 +9,8 @@
 
 
 audio::drain::EndPointCallback::EndPointCallback() :
-  m_outputFunction(nullptr),
-  m_inputFunction(nullptr) {
+  m_outputFunction(null),
+  m_inputFunction(null) {
 	
 }
 
@@ -50,7 +50,7 @@ bool audio::drain::EndPointCallback::process(audio::Time& _time,
                                              void*& _output,
                                              size_t& _outputNbChunk){
 	audio::drain::AutoLogInOut tmpLog("EndPointCallback");
-	if (m_inputFunction != nullptr) {
+	if (m_inputFunction != null) {
 		// Call user ...
 		DRAIN_VERBOSE("call user set " << _inputNbChunk << "*" << m_input.getMap().size());
 		m_inputFunction(_input,
@@ -61,7 +61,7 @@ bool audio::drain::EndPointCallback::process(audio::Time& _time,
 		                m_output.getMap());
 		return true;
 	}
-	if (m_outputFunction != nullptr) {
+	if (m_outputFunction != null) {
 		// update buffer size ...
 		m_outputData.resize(_inputNbChunk*m_output.getMap().size()*m_formatSize);
 		// clean output to prevent errors ...
diff --git a/audio/drain/EndPointWrite.cpp b/audio/drain/EndPointWrite.cpp
index 2914115..ec0179d 100644
--- a/audio/drain/EndPointWrite.cpp
+++ b/audio/drain/EndPointWrite.cpp
@@ -8,7 +8,7 @@
 
 
 audio::drain::EndPointWrite::EndPointWrite() :
-  m_function(nullptr),
+  m_function(null),
   m_bufferSizeMicroseconds(1000000),
   m_bufferSizeChunk(32),
   m_bufferUnderFlowSize(0) {
@@ -58,7 +58,7 @@ bool audio::drain::EndPointWrite::process(audio::Time& _time,
                                           size_t& _outputNbChunk){
 	audio::drain::AutoLogInOut tmpLog("EndPointWrite");
 	//DRAIN_INFO("                              nb Sample in buffer : " << m_buffer.size());
-	if (m_function != nullptr) {
+	if (m_function != null) {
 		// TODO : Rework this ...
 		if (m_buffer.getSize() <= 20000) {
 			m_function(_time, _inputNbChunk, m_output.getFormat(), m_output.getFrequency(), m_output.getMap());
diff --git a/audio/drain/Equalizer.cpp b/audio/drain/Equalizer.cpp
index ba241a4..f84ec77 100644
--- a/audio/drain/Equalizer.cpp
+++ b/audio/drain/Equalizer.cpp
@@ -45,7 +45,7 @@ bool audio::drain::Equalizer::process(audio::Time& _time,
                                       size_t& _outputNbChunk) {
 	_outputNbChunk = _inputNbChunk;
 	_output = _input;
-	if (_input == nullptr) {
+	if (_input == null) {
 		return false;
 	}
 	m_algo.process(_output, _input, _inputNbChunk);
diff --git a/audio/drain/FormatUpdate.cpp b/audio/drain/FormatUpdate.cpp
index 8aca3d9..a424582 100644
--- a/audio/drain/FormatUpdate.cpp
+++ b/audio/drain/FormatUpdate.cpp
@@ -123,7 +123,7 @@ static void convert__float__to__int32(void* _input, void* _output, size_t _nbSam
 
 
 audio::drain::FormatUpdate::FormatUpdate() :
-  m_functionConvert(nullptr) {
+  m_functionConvert(null) {
 	
 }
 
@@ -251,7 +251,7 @@ bool audio::drain::FormatUpdate::process(audio::Time& _time,
 		_outputNbChunk = _inputNbChunk;
 		return true;
 	}
-	if (_input == nullptr) {
+	if (_input == null) {
 		_output = &(m_outputData[0]);
 		_outputNbChunk = 0;
 		DRAIN_ERROR("null pointer input ... ");
@@ -260,7 +260,7 @@ bool audio::drain::FormatUpdate::process(audio::Time& _time,
 	_outputNbChunk = _inputNbChunk;
 	m_outputData.resize(_outputNbChunk*m_input.getMap().size()*m_formatSize);
 	_output = &(m_outputData[0]);
-	if (m_functionConvert == nullptr) {
+	if (m_functionConvert == null) {
 		DRAIN_ERROR("null function ptr");
 		return false;
 	}
diff --git a/audio/drain/IOFormatInterface.cpp b/audio/drain/IOFormatInterface.cpp
index 2871c10..aa001c7 100644
--- a/audio/drain/IOFormatInterface.cpp
+++ b/audio/drain/IOFormatInterface.cpp
@@ -105,7 +105,7 @@ void audio::drain::IOFormatInterface::setFrequency(float _value) {
 }
 
 void audio::drain::IOFormatInterface::configurationChange() {
-	if (m_ioChangeFunctor != nullptr) {
+	if (m_ioChangeFunctor != null) {
 		m_ioChangeFunctor();
 	}
 }
diff --git a/audio/drain/Process.cpp b/audio/drain/Process.cpp
index 936dd30..58147de 100644
--- a/audio/drain/Process.cpp
+++ b/audio/drain/Process.cpp
@@ -27,7 +27,7 @@ audio::drain::Process::~Process() {
 bool audio::drain::Process::push(audio::Time& _time,
                                  void* _data,
                                  size_t _nbChunk) {
-	void* out = nullptr;
+	void* out = null;
 	size_t nbChunkOut;
 	DRAIN_VERBOSE("        Process push");
 	process(_time, _data, _nbChunk, out, nbChunkOut);
@@ -40,16 +40,16 @@ bool audio::drain::Process::pull(audio::Time& _time,
                                  size_t _chunkSize) {
 	//DRAIN_DEBUG("Execute:");
 	while(m_data.size() < _nbChunk*_chunkSize) {
-		void* in = nullptr;
+		void* in = null;
 		size_t nbChunkIn = _nbChunk - m_data.size()/_chunkSize;
-		void* out = nullptr;
+		void* out = null;
 		size_t nbChunkOut;
 		if (nbChunkIn < 128) {
 			nbChunkIn = 128;
 		}
 		// TODO : maybe remove this for input data ...
 		for (int32_t iii=m_listAlgo.size()-1; iii >=0; --iii) {
-			if (m_listAlgo[iii] != nullptr) {
+			if (m_listAlgo[iii] != null) {
 				nbChunkIn = m_listAlgo[iii]->needInputData(nbChunkIn);
 			}
 		}
@@ -92,7 +92,7 @@ bool audio::drain::Process::process(audio::Time& _time,
 	DRAIN_VERBOSE(" process : " << m_listAlgo.size() << " algos nbChunk=" << _inNbChunk);
 	for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
 		DRAIN_VERBOSE("            Algo " << iii+1 << "/" << m_listAlgo.size());
-		if (m_listAlgo[iii] != nullptr) {
+		if (m_listAlgo[iii] != null) {
 			m_listAlgo[iii]->process(_time, _inData, _inNbChunk, _outData, _outNbChunk);
 			_inData = _outData;
 			_inNbChunk = _outNbChunk;
@@ -427,7 +427,7 @@ bool audio::drain::Process::processIn(void* _inData,
                                       size_t _inNbChunk,
                                       void* _outData,
                                       size_t _outNbChunk){
-	void* outData = nullptr;
+	void* outData = null;
 	size_t outSize = 0;
 	bool error = process(_inData, _inNbChunk, outData, outSize);
 	if (outSize != _outNbChunk) {
@@ -484,7 +484,7 @@ void audio::drain::Process::generateDot(etk::FSNode& _node,
 		// --       STEP 3     --
 		// ----------------------
 		for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-			if (m_listAlgo[iii] == nullptr) {
+			if (m_listAlgo[iii] == null) {
 				continue;
 			}
 			etk::String connectStringSecond = "ALGO_" + etk::toString(_basicID) + "__" + etk::toString(iii);
@@ -533,7 +533,7 @@ void audio::drain::Process::generateDot(etk::FSNode& _node,
 		// ----------------------
 		for (int32_t iii=m_listAlgo.size()-1; iii>=0; --iii) {
 		//for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-			if (m_listAlgo[iii] == nullptr) {
+			if (m_listAlgo[iii] == null) {
 				continue;
 			}
 			etk::String connectStringSecond = "ALGO_" + etk::toString(_basicID) + "__" + etk::toString(iii);
@@ -590,7 +590,7 @@ void audio::drain::Process::generateDotProcess(etk::FSNode& _node, int32_t _offs
 	_node << "				node [shape=box];\n";
 	if (_reserseGraph == false) {
 		for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-			if (m_listAlgo[iii] == nullptr) {
+			if (m_listAlgo[iii] == null) {
 				continue;
 			}
 			etk::String connectStringSecond = "ALGO_" + etk::toString(_basicID) + "__" + etk::toString(iii);
@@ -609,7 +609,7 @@ void audio::drain::Process::generateDotProcess(etk::FSNode& _node, int32_t _offs
 	} else {
 		//for (int32_t iii=m_listAlgo.size()-1; iii>=0; --iii) {
 		for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-			if (m_listAlgo[iii] == nullptr) {
+			if (m_listAlgo[iii] == null) {
 				continue;
 			}
 			etk::String connectStringSecond = "ALGO_" + etk::toString(_basicID) + "__" + etk::toString(iii);
@@ -648,7 +648,7 @@ void audio::drain::Process::generateDotProcess(etk::FSNode& _node, int32_t _offs
 
 
 void audio::drain::Process::generateStatus(const etk::String& _origin, const etk::String& _status) {
-	if (m_statusFunction != nullptr) {
+	if (m_statusFunction != null) {
 		m_statusFunction(_origin, _status);
 	}
 }
diff --git a/audio/drain/Process.hpp b/audio/drain/Process.hpp
index 022cffb..1246b28 100644
--- a/audio/drain/Process.hpp
+++ b/audio/drain/Process.hpp
@@ -116,7 +116,7 @@ namespace audio {
 				
 				template<typename T> ememory::SharedPtr<T> get(const etk::String& _name) {
 					for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-						if (m_listAlgo[iii] == nullptr) {
+						if (m_listAlgo[iii] == null) {
 							continue;
 						}
 						if (m_listAlgo[iii]->getName() == _name) {
@@ -127,7 +127,7 @@ namespace audio {
 				}
 				template<typename T> ememory::SharedPtr<const T> get(const etk::String& _name) const {
 					for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
-						if (m_listAlgo[iii] == nullptr) {
+						if (m_listAlgo[iii] == null) {
 							continue;
 						}
 						if (m_listAlgo[iii]->getName() == _name) {
@@ -142,7 +142,7 @@ namespace audio {
 				template<typename T> void removeIfFirst() {
 					if (m_listAlgo.size() > 0) {
 						ememory::SharedPtr<T> algoEP = get<T>(0);
-						if (algoEP != nullptr) {
+						if (algoEP != null) {
 							m_listAlgo.erase(m_listAlgo.begin());
 						}
 					}
@@ -150,7 +150,7 @@ namespace audio {
 				template<typename T> void removeIfLast() {
 					if (m_listAlgo.size() > 0) {
 						ememory::SharedPtr<T> algoEP = get<T>(m_listAlgo.size()-1);
-						if (algoEP != nullptr) {
+						if (algoEP != null) {
 							m_listAlgo.erase(m_listAlgo.begin()+m_listAlgo.size()-1);
 						}
 					}
@@ -158,7 +158,7 @@ namespace audio {
 				template<typename T> bool hasType() {
 					for (size_t iii=0; iii<m_listAlgo.size(); ++iii) {
 						ememory::SharedPtr<T> tmp = ememory::dynamicPointerCast<T>(m_listAlgo[iii]);
-						if (tmp != nullptr) {
+						if (tmp != null) {
 							return true;
 						}
 					}
diff --git a/audio/drain/Resampler.cpp b/audio/drain/Resampler.cpp
index 95fa56b..b85c411 100644
--- a/audio/drain/Resampler.cpp
+++ b/audio/drain/Resampler.cpp
@@ -9,7 +9,7 @@
 
 audio::drain::Resampler::Resampler() :
   #ifdef HAVE_SPEEX_DSP_RESAMPLE
-    m_speexResampler(nullptr),
+    m_speexResampler(null),
   #endif
   m_positionRead(0),
   m_positionWrite(0) {
@@ -31,9 +31,9 @@ ememory::SharedPtr<audio::drain::Resampler> audio::drain::Resampler::create() {
 
 audio::drain::Resampler::~Resampler() {
 	#ifdef HAVE_SPEEX_DSP_RESAMPLE
-		if (m_speexResampler != nullptr) {
+		if (m_speexResampler != null) {
 			speex_resampler_destroy(m_speexResampler);
-			m_speexResampler = nullptr;
+			m_speexResampler = null;
 		}
 	#endif
 }
@@ -64,9 +64,9 @@ void audio::drain::Resampler::configurationChange() {
 		return;
 	}
 	#ifdef HAVE_SPEEX_DSP_RESAMPLE
-		if (m_speexResampler != nullptr) {
+		if (m_speexResampler != null) {
 			speex_resampler_destroy(m_speexResampler);
-			m_speexResampler = nullptr;
+			m_speexResampler = null;
 		}
 		int err = 0;
 		DRAIN_WARNING("Create resampler for : " << m_input << " to " << m_output);
@@ -95,7 +95,7 @@ bool audio::drain::Resampler::process(audio::Time& _time,
 		_outputNbChunk = _inputNbChunk;
 		return true;
 	}
-	if (_input == nullptr) {
+	if (_input == null) {
 		_output = &(m_outputData[0]);
 		_outputNbChunk = 0;
 		DRAIN_ERROR("null pointer input ... ");
@@ -118,7 +118,7 @@ bool audio::drain::Resampler::process(audio::Time& _time,
 		
 		m_outputData.resize(_outputNbChunk*m_output.getMap().size()*m_formatSize*16);
 		_output = &(m_outputData[0]);
-		if (m_speexResampler == nullptr) {
+		if (m_speexResampler == null) {
 			DRAIN_ERROR("                               No speex resampler");
 			return false;
 		}
diff --git a/audio/drain/Volume.cpp b/audio/drain/Volume.cpp
index e02a571..400d7ac 100644
--- a/audio/drain/Volume.cpp
+++ b/audio/drain/Volume.cpp
@@ -12,7 +12,7 @@ extern "C" {
 
 audio::drain::Volume::Volume() :
   m_volumeAppli(1.0f),
-  m_functionConvert(nullptr) {
+  m_functionConvert(null) {
 	
 }
 
@@ -162,7 +162,7 @@ void audio::drain::Volume::volumeChange() {
 	float volumedB = 0.0f;
 	bool mute = false;
 	for (size_t iii=0; iii<m_volumeList.size(); ++iii) {
-		if (m_volumeList[iii] == nullptr) {
+		if (m_volumeList[iii] == null) {
 			continue;
 		}
 		if (m_volumeList[iii]->getMute() == true) {
@@ -338,7 +338,7 @@ bool audio::drain::Volume::process(audio::Time& _time,
 		_outputNbChunk = _inputNbChunk;
 		return true;
 	}
-	if (_input == nullptr) {
+	if (_input == null) {
 		_output = &(m_outputData[0]);
 		_outputNbChunk = 0;
 		DRAIN_ERROR("null pointer input ... ");
@@ -347,7 +347,7 @@ bool audio::drain::Volume::process(audio::Time& _time,
 	_outputNbChunk = _inputNbChunk;
 	m_outputData.resize(_outputNbChunk*m_input.getMap().size()*m_formatSize);
 	_output = &(m_outputData[0]);
-	if (m_functionConvert == nullptr) {
+	if (m_functionConvert == null) {
 		DRAIN_ERROR("null function ptr");
 		return false;
 	}
@@ -357,11 +357,11 @@ bool audio::drain::Volume::process(audio::Time& _time,
 }
 
 void audio::drain::Volume::addVolumeStage(const ememory::SharedPtr<audio::drain::VolumeElement>& _volume) {
-	if (_volume == nullptr) {
+	if (_volume == null) {
 		return;
 	}
 	for (size_t iii=0; iii<m_volumeList.size(); ++iii) {
-		if (m_volumeList[iii] == nullptr) {
+		if (m_volumeList[iii] == null) {
 			continue;
 		}
 		if (m_volumeList[iii] == _volume) {
@@ -380,7 +380,7 @@ bool audio::drain::Volume::setParameter(const etk::String& _parameter, const etk
 	if (_parameter == "FLOW") {
 		// set Volume ...
 		for (auto &it : m_volumeList) {
-			if (it == nullptr) {
+			if (it == null) {
 				continue;
 			}
 			if (it->getName() == "FLOW") {
@@ -408,7 +408,7 @@ etk::String audio::drain::Volume::getParameter(const etk::String& _parameter) co
 	if (_parameter == "FLOW") {
 		// set Volume ...
 		for (auto &it : m_volumeList) {
-			if (it == nullptr) {
+			if (it == null) {
 				continue;
 			}
 			if (it->getName() == "FLOW") {
@@ -424,7 +424,7 @@ etk::String audio::drain::Volume::getParameterProperty(const etk::String& _param
 	if (_parameter == "FLOW") {
 		// set Volume ...
 		for (auto &it : m_volumeList) {
-			if (it == nullptr) {
+			if (it == null) {
 				continue;
 			}
 			if (it->getName() == "FLOW") {
@@ -439,7 +439,7 @@ etk::String audio::drain::Volume::getParameterProperty(const etk::String& _param
 etk::String audio::drain::Volume::getDotDesc() {
 	etk::String out = audio::drain::Algo::getDotDesc();
 	for (auto &it : m_volumeList) {
-		if (it == nullptr) {
+		if (it == null) {
 			continue;
 		}
 		out += "\\n" + it->getName() + "=" + etk::toString(it->getVolume()) + "dB";
diff --git a/tools/drainBiQuadProfiling/appl/Windows.cpp b/tools/drainBiQuadProfiling/appl/Windows.cpp
index 231a6d0..8930617 100644
--- a/tools/drainBiQuadProfiling/appl/Windows.cpp
+++ b/tools/drainBiQuadProfiling/appl/Windows.cpp
@@ -16,18 +16,18 @@
 
 define APPL_SAVE_FILE_MACRO(type,fileName,dataPointer,nbElement) \
 	do { \
-		static FILE *pointerOnFile = nullptr; \
+		static FILE *pointerOnFile = null; \
 		static bool errorOpen = false; \
-		if (pointerOnFile == nullptr) { \
+		if (pointerOnFile == null) { \
 			APPL_WARNING("open file '" << fileName << "' type=" << #type); \
 			pointerOnFile = fopen(fileName,"w"); \
 			if (    errorOpen == false \
-			     && pointerOnFile == nullptr) { \
+			     && pointerOnFile == null) { \
 				APPL_ERROR("ERROR OPEN file ... '" << fileName << "' type=" << #type); \
 				errorOpen=true; \
 			} \
 		} \
-		if (pointerOnFile != nullptr) { \
+		if (pointerOnFile != null) { \
 			fwrite((dataPointer), sizeof(type), (nbElement), pointerOnFile); \
 			/* fflush(pointerOnFile);*/ \
 		} \
@@ -67,7 +67,7 @@ void appl::Windows::init() {
 	setTitle("Drain Equalizer Profiler");
 	
 	m_gui = ewol::widget::Composer::create(ewol::widget::Composer::file, "DATA:gui.xml");
-	if (m_gui != nullptr) {
+	if (m_gui != null) {
 		setSubWidget(m_gui);
 	}
 	subBind(ewol::widget::Button, "sample-rate-low", signalPressed, sharedFromThis(), &appl::Windows::onCallbackSampleRateLow);
@@ -265,8 +265,8 @@ void appl::Windows::onCallbackStart16() {
 			}
 		}
 		// process
-		int16_t* output = nullptr;
-		void* outputVoid = nullptr;
+		int16_t* output = null;
+		void* outputVoid = null;
 		size_t outputNbChunk = 0;
 		APPL_SAVE_FILE_MACRO(int16_t,"aaa_test_INPUT_16.raw",&data[0],data.size());
 		bq.process(&data[0], &data[0], data.size(), 1, 1);
diff --git a/tools/drainEqualizerProfiling/appl/Windows.cpp b/tools/drainEqualizerProfiling/appl/Windows.cpp
index 6655eb6..9637dc3 100644
--- a/tools/drainEqualizerProfiling/appl/Windows.cpp
+++ b/tools/drainEqualizerProfiling/appl/Windows.cpp
@@ -14,18 +14,18 @@
 
 #define APPL_SAVE_FILE_MACRO(type,fileName,dataPointer,nbElement) \
 	do { \
-		static FILE *pointerOnFile = nullptr; \
+		static FILE *pointerOnFile = null; \
 		static bool errorOpen = false; \
-		if (pointerOnFile == nullptr) { \
+		if (pointerOnFile == null) { \
 			APPL_WARNING("open file '" << fileName << "' type=" << #type); \
 			pointerOnFile = fopen(fileName,"w"); \
 			if (    errorOpen == false \
-			     && pointerOnFile == nullptr) { \
+			     && pointerOnFile == null) { \
 				APPL_ERROR("ERROR OPEN file ... '" << fileName << "' type=" << #type); \
 				errorOpen=true; \
 			} \
 		} \
-		if (pointerOnFile != nullptr) { \
+		if (pointerOnFile != null) { \
 			fwrite((dataPointer), sizeof(type), (nbElement), pointerOnFile); \
 			/* fflush(pointerOnFile);*/ \
 		} \
@@ -54,7 +54,7 @@ void appl::Windows::init() {
 	setTitle("Drain Equalizer Profiler");
 	
 	m_gui = ewol::widget::Composer::create(ewol::widget::Composer::file, "DATA:gui.xml");
-	if (m_gui != nullptr) {
+	if (m_gui != null) {
 		setSubWidget(m_gui);
 	}
 	subBind(ewol::widget::Button, "sample-rate-low", signalPressed, sharedFromThis(), &appl::Windows::onCallbackSampleRateLow);
@@ -200,8 +200,8 @@ void appl::Windows::onCallbackStart16() {
 			}
 		}
 		// process
-		int16_t* output = nullptr;
-		void* outputVoid = nullptr;
+		int16_t* output = null;
+		void* outputVoid = null;
 		size_t outputNbChunk = 0;
 		audio::Time time;
 		APPL_SAVE_FILE_MACRO(int16_t, "aaa_test_INPUT.raw", &data[0], data.size());
@@ -241,8 +241,8 @@ void appl::Windows::onCallbackStartFloat() {
 			}
 		}
 		// process
-		float* output = nullptr;
-		void* outputVoid = nullptr;
+		float* output = null;
+		void* outputVoid = null;
 		size_t outputNbChunk = 0;
 		audio::Time time;
 		APPL_SAVE_FILE_MACRO(int16_t,"aaa_test_INPUT_F.raw",&data[0],data.size());