diff --git a/airtalgo/Algo.cpp b/airtalgo/Algo.cpp
index 27f3e88..f68f826 100644
--- a/airtalgo/Algo.cpp
+++ b/airtalgo/Algo.cpp
@@ -39,17 +39,24 @@ void airtalgo::Algo::configurationChange() {
 		m_needProcess = true;
 	}
 	switch (m_output.getFormat()) {
-		case format_int16:
+		case audio::format_int8:
+			m_formatSize = sizeof(int8_t);
+			break;
+		case audio::format_int16:
 			m_formatSize = sizeof(int16_t);
 			break;
-		case format_int16_on_int32:
-		case format_int32:
+		case audio::format_int24:
+		case audio::format_int16_on_int32:
+		case audio::format_int32:
 			m_formatSize = sizeof(int32_t);
 			break;
-		case format_float:
+		case audio::format_float:
 			m_formatSize = sizeof(float);
 			break;
-		case format_unknow:
+		case audio::format_double:
+			m_formatSize = sizeof(double);
+			break;
+		case audio::format_unknow:
 			AIRTALGO_ERROR("format not configured...");
 			m_formatSize = 8;
 			break;
diff --git a/airtalgo/Algo.h b/airtalgo/Algo.h
index 35173d9..e5cfac9 100644
--- a/airtalgo/Algo.h
+++ b/airtalgo/Algo.h
@@ -11,8 +11,8 @@
 #include <string>
 #include <vector>
 #include <stdint.h>
-#include <airtalgo/format.h>
-#include <airtalgo/channel.h>
+#include <audio/format.h>
+#include <audio/channel.h>
 #include <chrono>
 #include <functional>
 #include <memory>
@@ -122,38 +122,38 @@ namespace airtalgo{
 			 */
 			virtual size_t needInputData(size_t _output);
 		protected: // note when nothing ==> support all type
-			std::vector<airtalgo::format> m_supportedFormat;
+			std::vector<audio::format> m_supportedFormat;
 		public:
-			virtual std::vector<airtalgo::format> getFormatSupportedInput() {
+			virtual std::vector<audio::format> getFormatSupportedInput() {
 				if (m_output.getConfigured() == true) {
-					std::vector<airtalgo::format> out;
+					std::vector<audio::format> out;
 					out.push_back(m_output.getFormat());
 					return out;
 				}
 				return m_supportedFormat;
 			};
-			virtual std::vector<airtalgo::format> getFormatSupportedOutput() {
+			virtual std::vector<audio::format> getFormatSupportedOutput() {
 				if (m_input.getConfigured() == true) {
-					std::vector<airtalgo::format> out;
+					std::vector<audio::format> out;
 					out.push_back(m_input.getFormat());
 					return out;
 				}
 				return m_supportedFormat;
 			};
 		protected: // note when nothing ==> support all type
-			std::vector<std::vector<airtalgo::channel>> m_supportedMap;
+			std::vector<std::vector<audio::channel>> m_supportedMap;
 		public:
-			virtual std::vector<std::vector<airtalgo::channel>> getMapSupportedInput() {
+			virtual std::vector<std::vector<audio::channel>> getMapSupportedInput() {
 				if (m_output.getConfigured() == true) {
-					std::vector<std::vector<airtalgo::channel>> out;
+					std::vector<std::vector<audio::channel>> out;
 					out.push_back(m_output.getMap());
 					return out;
 				}
 				return m_supportedMap;
 			};
-			virtual std::vector<std::vector<airtalgo::channel>> getMapSupportedOutput() {
+			virtual std::vector<std::vector<audio::channel>> getMapSupportedOutput() {
 				if (m_input.getConfigured() == true) {
-					std::vector<std::vector<airtalgo::channel>> out;
+					std::vector<std::vector<audio::channel>> out;
 					out.push_back(m_input.getMap());
 					return out;
 				}
diff --git a/airtalgo/ChannelReorder.cpp b/airtalgo/ChannelReorder.cpp
index ffe2b12..d7ca3e8 100644
--- a/airtalgo/ChannelReorder.cpp
+++ b/airtalgo/ChannelReorder.cpp
@@ -71,16 +71,15 @@ bool airtalgo::ChannelReorder::process(std::chrono::system_clock::time_point& _t
 	_output = &(m_outputData[0]);
 	// real process: (only depend of data size):
 	switch (m_output.getFormat()) {
-		default:
-		case format_int16:
+		case audio::format_int8:
 			{
 				AIRTALGO_VERBOSE("convert " << m_input.getMap() << " ==> " << m_output.getMap() << " format=" << int32_t(m_formatSize));
-				int16_t* in = static_cast<int16_t*>(_input);
-				int16_t* out = static_cast<int16_t*>(_output);
+				int8_t* in = static_cast<int8_t*>(_input);
+				int8_t* out = static_cast<int8_t*>(_output);
 				for (size_t kkk=0; kkk<m_output.getMap().size(); ++kkk) {
 					int32_t convertId = -1;
 					if (    m_input.getMap().size() == 1
-					     && m_input.getMap()[0] == airtalgo::channel_frontCenter) {
+					     && m_input.getMap()[0] == audio::channel_frontCenter) {
 						convertId = 0;
 					} else {
 						for (size_t jjj=0; jjj<m_input.getMap().size(); ++jjj) {
@@ -103,9 +102,42 @@ bool airtalgo::ChannelReorder::process(std::chrono::system_clock::time_point& _t
 				}
 			}
 			break;
-		case format_int16_on_int32:
-		case format_int32:
-		case format_float:
+		default:
+		case audio::format_int16:
+			{
+				AIRTALGO_VERBOSE("convert " << m_input.getMap() << " ==> " << m_output.getMap() << " format=" << int32_t(m_formatSize));
+				int16_t* in = static_cast<int16_t*>(_input);
+				int16_t* out = static_cast<int16_t*>(_output);
+				for (size_t kkk=0; kkk<m_output.getMap().size(); ++kkk) {
+					int32_t convertId = -1;
+					if (    m_input.getMap().size() == 1
+					     && m_input.getMap()[0] == audio::channel_frontCenter) {
+						convertId = 0;
+					} else {
+						for (size_t jjj=0; jjj<m_input.getMap().size(); ++jjj) {
+							if (m_output.getMap()[kkk] == m_input.getMap()[jjj]) {
+								convertId = jjj;
+								break;
+							}
+						}
+					}
+					AIRTALGO_VERBOSE("    " << convertId << " ==> " << kkk);
+					if (convertId == -1) {
+						for (size_t iii=0; iii<_outputNbChunk; ++iii) {
+							out[iii*m_output.getMap().size()+kkk] = 0;
+						}
+					} else {
+						for (size_t iii=0; iii<_outputNbChunk; ++iii) {
+							out[iii*m_output.getMap().size()+kkk] = in[iii*m_input.getMap().size()+convertId];
+						}
+					}
+				}
+			}
+			break;
+		case audio::format_int16_on_int32:
+		case audio::format_int24:
+		case audio::format_int32:
+		case audio::format_float:
 			{
 				AIRTALGO_VERBOSE("convert (2) " << m_input.getMap() << " ==> " << m_output.getMap());
 				uint32_t* in = static_cast<uint32_t*>(_input);
@@ -113,7 +145,37 @@ bool airtalgo::ChannelReorder::process(std::chrono::system_clock::time_point& _t
 				for (size_t kkk=0; kkk<m_output.getMap().size(); ++kkk) {
 					int32_t convertId = -1;
 					if (    m_input.getMap().size() == 1
-					     && m_input.getMap()[0] == airtalgo::channel_frontCenter) {
+					     && m_input.getMap()[0] == audio::channel_frontCenter) {
+						convertId = 0;
+					} else {
+						for (size_t jjj=0; jjj<m_input.getMap().size(); ++jjj) {
+							if (m_output.getMap()[kkk] == m_input.getMap()[jjj]) {
+								convertId = jjj;
+								break;
+							}
+						}
+					}
+					if (convertId == -1) {
+						for (size_t iii=0; iii<_outputNbChunk; ++iii) {
+							out[iii*m_output.getMap().size()+kkk] = 0;
+						}
+					} else {
+						for (size_t iii=0; iii<_outputNbChunk; ++iii) {
+							out[iii*m_output.getMap().size()+kkk] = in[iii*m_input.getMap().size()+convertId];
+						}
+					}
+				}
+			}
+			break;
+		case audio::format_double:
+			{
+				AIRTALGO_VERBOSE("convert (2) " << m_input.getMap() << " ==> " << m_output.getMap());
+				uint64_t* in = static_cast<uint64_t*>(_input);
+				uint64_t* out = static_cast<uint64_t*>(_output);
+				for (size_t kkk=0; kkk<m_output.getMap().size(); ++kkk) {
+					int32_t convertId = -1;
+					if (    m_input.getMap().size() == 1
+					     && m_input.getMap()[0] == audio::channel_frontCenter) {
 						convertId = 0;
 					} else {
 						for (size_t jjj=0; jjj<m_input.getMap().size(); ++jjj) {
diff --git a/airtalgo/EndPointCallback.h b/airtalgo/EndPointCallback.h
index 5638e92..60d669f 100644
--- a/airtalgo/EndPointCallback.h
+++ b/airtalgo/EndPointCallback.h
@@ -14,14 +14,14 @@
 namespace airtalgo {
 	typedef std::function<void (const std::chrono::system_clock::time_point& _playTime,
 	                            size_t _nbChunk,
-	                            const std::vector<airtalgo::channel>& _map,
+	                            const std::vector<audio::channel>& _map,
 	                            void* _data,
-	                            enum airtalgo::format _type)> needDataFunction;
+	                            enum audio::format _type)> needDataFunction;
 	typedef std::function<void (const std::chrono::system_clock::time_point& _readTime,
 	                            size_t _nbChunk,
-	                            const std::vector<airtalgo::channel>& _map,
+	                            const std::vector<audio::channel>& _map,
 	                            const void* _data,
-	                            enum airtalgo::format _type)> haveNewDataFunction;
+	                            enum audio::format _type)> haveNewDataFunction;
 	class EndPointCallback : public EndPoint {
 		private:
 			needDataFunction m_outputFunction;
diff --git a/airtalgo/EndPointWrite.h b/airtalgo/EndPointWrite.h
index 197394e..d3611b8 100644
--- a/airtalgo/EndPointWrite.h
+++ b/airtalgo/EndPointWrite.h
@@ -14,8 +14,8 @@
 namespace airtalgo{
 	typedef std::function<void (const std::chrono::system_clock::time_point& _playTime,
 	                            const size_t& _nbChunk,
-	                            const std::vector<airtalgo::channel>& _map,
-	                            enum airtalgo::format _type)> needDataFunctionWrite;
+	                            const std::vector<audio::channel>& _map,
+	                            enum audio::format _type)> needDataFunctionWrite;
 	class EndPointWrite : public EndPoint {
 		private:
 			std::vector<int8_t> m_tmpData;
diff --git a/airtalgo/FormatUpdate.cpp b/airtalgo/FormatUpdate.cpp
index 5743c11..83dfd8e 100644
--- a/airtalgo/FormatUpdate.cpp
+++ b/airtalgo/FormatUpdate.cpp
@@ -159,82 +159,82 @@ void airtalgo::FormatUpdate::configurationChange() {
 	}
 	switch (m_input.getFormat()) {
 		default:
-		case format_int16:
+		case audio::format_int16:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					AIRTALGO_ERROR(" Impossible case 1");
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					m_functionConvert = &convert__int16__to__int16_on_int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16__to__int16_on_int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_functionConvert = &convert__int16__to__int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16__to__int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_float:
+				case audio::format_float:
 					m_functionConvert = &convert__int16__to__float;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16__to__float' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
 			}
 			break;
-		case format_int16_on_int32:
+		case audio::format_int16_on_int32:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					m_functionConvert = &convert__int16_on_int32__to__int16;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16_on_int32__to__int16' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					AIRTALGO_ERROR(" Impossible case 2");
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_functionConvert = &convert__int16_on_int32__to__int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16_on_int32__to__int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_float:
+				case audio::format_float:
 					m_functionConvert = &convert__int16_on_int32__to__float;
 					AIRTALGO_DEBUG(" use converter : 'convert__int16_on_int32__to__float' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
 			}
 			break;
-		case format_int32:
+		case audio::format_int32:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					m_functionConvert = &convert__int32__to__int16;
 					AIRTALGO_DEBUG(" use converter : 'convert__int32__to__int16' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					m_functionConvert = &convert__int32__to__int16_on_int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__int32__to__int16_on_int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int32:
+				case audio::format_int32:
 					AIRTALGO_ERROR(" Impossible case 3");
 					break;
-				case format_float:
+				case audio::format_float:
 					m_functionConvert = &convert__int32__to__float;
 					AIRTALGO_DEBUG(" use converter : 'convert__int32__to__float' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
 			}
 			break;
-		case format_float:
+		case audio::format_float:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					m_functionConvert = &convert__float__to__int16;
 					AIRTALGO_DEBUG(" use converter : 'convert__float__to__int16' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					m_functionConvert = &convert__float__to__int16_on_int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__float__to__int16_on_int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_functionConvert = &convert__float__to__int32;
 					AIRTALGO_DEBUG(" use converter : 'convert__float__to__int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR(" Impossible case 4");
 					break;
 			}
diff --git a/airtalgo/IOFormatInterface.cpp b/airtalgo/IOFormatInterface.cpp
index 6f6a351..afc4440 100644
--- a/airtalgo/IOFormatInterface.cpp
+++ b/airtalgo/IOFormatInterface.cpp
@@ -26,14 +26,14 @@ std::ostream& airtalgo::operator <<(std::ostream& _os, const IOFormatInterface&
 
 airtalgo::IOFormatInterface::IOFormatInterface() :
   m_configured(false),
-  m_format(airtalgo::format_unknow),
+  m_format(audio::format_unknow),
   m_map(),
   m_frequency(0) {
-	m_map.push_back(airtalgo::channel_frontLeft);
-	m_map.push_back(airtalgo::channel_frontRight);
+	m_map.push_back(audio::channel_frontLeft);
+	m_map.push_back(audio::channel_frontRight);
 }
 
-airtalgo::IOFormatInterface::IOFormatInterface(std::vector<airtalgo::channel> _map, airtalgo::format _format, float _frequency) :
+airtalgo::IOFormatInterface::IOFormatInterface(std::vector<audio::channel> _map, audio::format _format, float _frequency) :
   m_configured(true),
   m_format(_format),
   m_map(_map),
@@ -41,7 +41,7 @@ airtalgo::IOFormatInterface::IOFormatInterface(std::vector<airtalgo::channel> _m
 	
 }
 
-void airtalgo::IOFormatInterface::set(std::vector<airtalgo::channel> _map, airtalgo::format _format, float _frequency) {
+void airtalgo::IOFormatInterface::set(std::vector<audio::channel> _map, audio::format _format, float _frequency) {
 	bool hasChange = false;
 	if (m_map != _map) {
 		m_map = _map;
@@ -69,11 +69,11 @@ bool airtalgo::IOFormatInterface::getConfigured() const {
 	return m_configured;
 }
 
-airtalgo::format airtalgo::IOFormatInterface::getFormat() const {
+audio::format airtalgo::IOFormatInterface::getFormat() const {
 	return m_format;
 }
 
-void airtalgo::IOFormatInterface::setFormat(airtalgo::format _value) {
+void airtalgo::IOFormatInterface::setFormat(audio::format _value) {
 	if (m_format == _value) {
 		return;
 	}
@@ -82,11 +82,11 @@ void airtalgo::IOFormatInterface::setFormat(airtalgo::format _value) {
 	configurationChange();
 }
 
-const std::vector<airtalgo::channel>& airtalgo::IOFormatInterface::getMap() const{
+const std::vector<audio::channel>& airtalgo::IOFormatInterface::getMap() const{
 	return m_map;
 }
 
-void airtalgo::IOFormatInterface::setMap(const std::vector<airtalgo::channel>& _value) {
+void airtalgo::IOFormatInterface::setMap(const std::vector<audio::channel>& _value) {
 	if (m_map == _value) {
 		return;
 	}
diff --git a/airtalgo/IOFormatInterface.h b/airtalgo/IOFormatInterface.h
index bfbcc94..8185303 100644
--- a/airtalgo/IOFormatInterface.h
+++ b/airtalgo/IOFormatInterface.h
@@ -11,8 +11,8 @@
 #include <string>
 #include <vector>
 #include <stdint.h>
-#include <airtalgo/format.h>
-#include <airtalgo/channel.h>
+#include <audio/format.h>
+#include <audio/channel.h>
 #include <chrono>
 #include <functional>
 #include <memory>
@@ -23,39 +23,39 @@ namespace airtalgo{
 	class IOFormatInterface {
 		public:
 			IOFormatInterface();
-			IOFormatInterface(std::vector<airtalgo::channel> _map, airtalgo::format _format=airtalgo::format_int16, float _frequency=48000.0f);
-			void set(std::vector<airtalgo::channel> _map, airtalgo::format _format=airtalgo::format_int16, float _frequency=48000.0f);
+			IOFormatInterface(std::vector<audio::channel> _map, audio::format _format=audio::format_int16, float _frequency=48000.0f);
+			void set(std::vector<audio::channel> _map, audio::format _format=audio::format_int16, float _frequency=48000.0f);
 		protected:
 			bool m_configured;
 		public:
 			void setConfigured(bool _value);
 			bool getConfigured() const;
 		protected:
-			airtalgo::format m_format; //!< input Algo Format
+			audio::format m_format; //!< input Algo Format
 		public:
 			/**
 			 * @brief Get the algo format.
 			 * @return the current Format.
 			 */
-			airtalgo::format getFormat() const;
+			audio::format getFormat() const;
 			/**
 			 * @brief Set the algo format.
 			 * @param[in] _value New Format.
 			 */
-			void setFormat(airtalgo::format _value);
+			void setFormat(audio::format _value);
 		protected:
-			std::vector<airtalgo::channel> m_map; //!< input channel Map
+			std::vector<audio::channel> m_map; //!< input channel Map
 		public:
 			/**
 			 * @brief Get the algo channel Map.
 			 * @return the current channel Map.
 			 */
-			const std::vector<airtalgo::channel>& getMap() const;
+			const std::vector<audio::channel>& getMap() const;
 			/**
 			 * @brief Set the algo channel Map.
 			 * @param[in] _value New channel Map.
 			 */
-			void setMap(const std::vector<airtalgo::channel>& _value);
+			void setMap(const std::vector<audio::channel>& _value);
 		protected:
 			float m_frequency; //!< input Algo Format
 		public:
diff --git a/airtalgo/Process.cpp b/airtalgo/Process.cpp
index df99929..54f0fd4 100644
--- a/airtalgo/Process.cpp
+++ b/airtalgo/Process.cpp
@@ -9,8 +9,8 @@
 #include <string>
 #include <vector>
 #include <stdint.h>
-#include <airtalgo/format.h>
-#include <airtalgo/channel.h>
+#include <audio/format.h>
+#include <audio/channel.h>
 #include <airtalgo/Process.h>
 #include <airtalgo/ChannelReorder.h>
 #include <airtalgo/FormatUpdate.h>
@@ -190,13 +190,13 @@ void airtalgo::Process::updateInterAlgo() {
 			std::vector<float> freqIn = m_listAlgo[iii]->getFrequencySupportedInput();
 			std::vector<float> freq = getUnion<float>(freqOut, freqIn);
 			// step 2 : Check map:
-			std::vector<std::vector<airtalgo::channel>> mapOut = m_listAlgo[iii-1]->getMapSupportedOutput();
-			std::vector<std::vector<airtalgo::channel>> mapIn = m_listAlgo[iii]->getMapSupportedInput();
-			std::vector<std::vector<airtalgo::channel>> map = getUnion<std::vector<airtalgo::channel>>(mapOut, mapIn);
+			std::vector<std::vector<audio::channel>> mapOut = m_listAlgo[iii-1]->getMapSupportedOutput();
+			std::vector<std::vector<audio::channel>> mapIn = m_listAlgo[iii]->getMapSupportedInput();
+			std::vector<std::vector<audio::channel>> map = getUnion<std::vector<audio::channel>>(mapOut, mapIn);
 			// step 3 : Check Format:
-			std::vector<airtalgo::format> formatOut = m_listAlgo[iii-1]->getFormatSupportedOutput();
-			std::vector<airtalgo::format> formatIn = m_listAlgo[iii]->getFormatSupportedInput();
-			std::vector<airtalgo::format> format = getUnion<airtalgo::format>(formatOut, formatIn);
+			std::vector<audio::format> formatOut = m_listAlgo[iii-1]->getFormatSupportedOutput();
+			std::vector<audio::format> formatIn = m_listAlgo[iii]->getFormatSupportedInput();
+			std::vector<audio::format> format = getUnion<audio::format>(formatOut, formatIn);
 			
 			if (    freq.size() >= 1
 			     && map.size() >= 1
@@ -288,13 +288,13 @@ void airtalgo::Process::updateInterAlgo() {
 			if (out.getFrequency() != in.getFrequency()) {
 				
 				// TODO : Do it better: special check for resampler : only support int16_t
-				if (    out.getFormat() != format_int16
+				if (    out.getFormat() != audio::format_int16
 				     /* && out.getFormat() != format_float */) {
 					// need add a format Updater
 					std::shared_ptr<airtalgo::FormatUpdate> algo = airtalgo::FormatUpdate::create();
 					algo->setTemporary();
 					algo->setInputFormat(out);
-					out.setFormat(format_int16);
+					out.setFormat(audio::format_int16);
 					algo->setOutputFormat(out);
 					m_listAlgo.insert(m_listAlgo.begin()+iii, algo);
 					AIRTALGO_INFO("convert " << out.getFormat() << " -> " << in.getFormat());
diff --git a/airtalgo/Process.h b/airtalgo/Process.h
index 5ec6f7e..aa53330 100644
--- a/airtalgo/Process.h
+++ b/airtalgo/Process.h
@@ -11,8 +11,8 @@
 #include <string>
 #include <vector>
 #include <stdint.h>
-#include <airtalgo/format.h>
-#include <airtalgo/channel.h>
+#include <audio/format.h>
+#include <audio/channel.h>
 #include <airtalgo/Algo.h>
 #include <chrono>
 #include <memory>
diff --git a/airtalgo/Resampler.cpp b/airtalgo/Resampler.cpp
index bba0ade..b52ceb4 100644
--- a/airtalgo/Resampler.cpp
+++ b/airtalgo/Resampler.cpp
@@ -23,7 +23,7 @@ airtalgo::Resampler::Resampler() :
 void airtalgo::Resampler::init() {
 	airtalgo::Algo::init();
 	m_type = "Resampler";
-	m_supportedFormat.push_back(format_int16);
+	m_supportedFormat.push_back(audio::format_int16);
 }
 
 std::shared_ptr<airtalgo::Resampler> airtalgo::Resampler::create() {
@@ -47,7 +47,7 @@ void airtalgo::Resampler::configurationChange() {
 		AIRTALGO_ERROR("can not support Format Change ...");
 		m_needProcess = false;
 	}
-	if (m_input.getFormat() != format_int16) {
+	if (m_input.getFormat() != audio::format_int16) {
 		AIRTALGO_ERROR("can not support Format other than int16_t ...");
 		m_needProcess = false;
 		return;
diff --git a/airtalgo/Volume.cpp b/airtalgo/Volume.cpp
index ea50427..4af0c4d 100644
--- a/airtalgo/Volume.cpp
+++ b/airtalgo/Volume.cpp
@@ -20,8 +20,8 @@ airtalgo::Volume::Volume() :
 void airtalgo::Volume::init() {
 	airtalgo::Algo::init();
 	m_type = "Volume";
-	m_supportedFormat.push_back(format_int16);
-	m_supportedFormat.push_back(format_int16_on_int32);
+	m_supportedFormat.push_back(audio::format_int16);
+	m_supportedFormat.push_back(audio::format_int16_on_int32);
 }
 
 std::shared_ptr<airtalgo::Volume> airtalgo::Volume::create() {
@@ -90,50 +90,50 @@ void airtalgo::Volume::configurationChange() {
 	airtalgo::Algo::configurationChange();
 	switch (m_input.getFormat()) {
 		default:
-		case format_int16:
+		case audio::format_int16:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					m_functionConvert = &convert__int16__to__int16;
 					AIRTALGO_DEBUG("Use converter : 'convert__int16__to__int16' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int16_on_int32:
-				case format_int32:
+				case audio::format_int16_on_int32:
+				case audio::format_int32:
 					m_functionConvert = &convert__int16__to__int32;
 					AIRTALGO_DEBUG("Use converter : 'convert__int16__to__int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR("Impossible case 1");
 					break;
 			}
 			break;
-		case format_int16_on_int32:
-		case format_int32:
+		case audio::format_int16_on_int32:
+		case audio::format_int32:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					m_functionConvert = &convert__int32__to__int16;
 					AIRTALGO_DEBUG("Use converter : 'convert__int32__to__int16' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_int16_on_int32:
-				case format_int32:
+				case audio::format_int16_on_int32:
+				case audio::format_int32:
 					m_functionConvert = &convert__int32__to__int32;
 					AIRTALGO_DEBUG("Use converter : 'convert__int32__to__int32' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR("Impossible case 2");
 					break;
 			}
 			break;
-		case format_float:
+		case audio::format_float:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
-				case format_int16_on_int32:
-				case format_int32:
+				case audio::format_int16:
+				case audio::format_int16_on_int32:
+				case audio::format_int32:
 					AIRTALGO_ERROR("Impossible case 4");
 					break;
-				case format_float:
+				case audio::format_float:
 					m_functionConvert = &convert__float__to__float;
 					AIRTALGO_DEBUG("Use converter : 'convert__float__to__float' for " << m_input.getFormat() << " to " << m_output.getFormat());
 					break;
@@ -165,10 +165,10 @@ void airtalgo::Volume::volumeChange() {
 	m_volumeAppli = std::pow(10.0f, volumedB/20.0f);
 	switch (m_input.getFormat()) {
 		default:
-		case format_int16:
+		case audio::format_int16:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 16;
@@ -178,7 +178,7 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 16-neareast;
 					}
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 16;
@@ -188,19 +188,19 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 16-neareast;
 					}
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_volumeCoef = m_volumeAppli*float(1<<16);
 					m_volumeDecalage = 0;
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR("Impossible case 1");
 					break;
 			}
 			break;
-		case format_int16_on_int32:
+		case audio::format_int16_on_int32:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 16;
@@ -210,7 +210,7 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 16-neareast;
 					}
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 16;
@@ -220,19 +220,19 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 16-neareast;
 					}
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_volumeCoef = m_volumeAppli*float(1<<16);
 					m_volumeDecalage = 0;
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR("Impossible case 2");
 					break;
 			}
 			break;
-		case format_int32:
+		case audio::format_int32:
 			switch (m_output.getFormat()) {
 				default:
-				case format_int16:
+				case audio::format_int16:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 32;
@@ -242,7 +242,7 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 32-neareast;
 					}
 					break;
-				case format_int16_on_int32:
+				case audio::format_int16_on_int32:
 					if (m_volumeAppli <= 1.0f) {
 						m_volumeCoef = m_volumeAppli*float(1<<16);
 						m_volumeDecalage = 32;
@@ -252,48 +252,48 @@ void airtalgo::Volume::volumeChange() {
 						m_volumeDecalage = 32-neareast;
 					}
 					break;
-				case format_int32:
+				case audio::format_int32:
 					m_volumeCoef = m_volumeAppli*float(1<<16);
 					m_volumeDecalage = 16;
 					break;
-				case format_float:
+				case audio::format_float:
 					AIRTALGO_ERROR("Impossible case 3");
 					break;
 			}
 			break;
-		case format_float:
+		case audio::format_float:
 			// nothing to do (use m_volumeAppli)
 			break;
 	}
 }
 
 
-std::vector<airtalgo::format> airtalgo::Volume::getFormatSupportedInput() {
-	std::vector<airtalgo::format> tmp;
-	if (m_output.getFormat() == format_float) {
-		tmp.push_back(format_float);
+std::vector<audio::format> airtalgo::Volume::getFormatSupportedInput() {
+	std::vector<audio::format> tmp;
+	if (m_output.getFormat() == audio::format_float) {
+		tmp.push_back(audio::format_float);
 	}
-	if (    m_output.getFormat() == format_int16
-	     || m_output.getFormat() == format_int16_on_int32
-	     || m_output.getFormat() == format_int32) {
-		tmp.push_back(format_int16);
-		tmp.push_back(format_int16_on_int32);
-		tmp.push_back(format_int32);
+	if (    m_output.getFormat() == audio::format_int16
+	     || m_output.getFormat() == audio::format_int16_on_int32
+	     || m_output.getFormat() == audio::format_int32) {
+		tmp.push_back(audio::format_int16);
+		tmp.push_back(audio::format_int16_on_int32);
+		tmp.push_back(audio::format_int32);
 	}
 	return tmp;
 };
 
-std::vector<airtalgo::format> airtalgo::Volume::getFormatSupportedOutput() {
-		std::vector<airtalgo::format> tmp;
-	if (m_input.getFormat() == format_float) {
-		tmp.push_back(format_float);
+std::vector<audio::format> airtalgo::Volume::getFormatSupportedOutput() {
+		std::vector<audio::format> tmp;
+	if (m_input.getFormat() == audio::format_float) {
+		tmp.push_back(audio::format_float);
 	}
-	if (    m_input.getFormat() == format_int16
-	     || m_input.getFormat() == format_int16_on_int32
-	     || m_input.getFormat() == format_int32) {
-		tmp.push_back(format_int16);
-		tmp.push_back(format_int16_on_int32);
-		tmp.push_back(format_int32);
+	if (    m_input.getFormat() == audio::format_int16
+	     || m_input.getFormat() == audio::format_int16_on_int32
+	     || m_input.getFormat() == audio::format_int32) {
+		tmp.push_back(audio::format_int16);
+		tmp.push_back(audio::format_int16_on_int32);
+		tmp.push_back(audio::format_int32);
 	}
 	return tmp;
 };
@@ -338,6 +338,7 @@ void airtalgo::Volume::addVolumeStage(const std::shared_ptr<VolumeElement>& _vol
 			continue;
 		}
 		if (it == _volume) {
+			// already done ...
 			return;
 		}
 		if (it->getName() == _volume->getName()) {
@@ -360,7 +361,11 @@ bool airtalgo::Volume::setParameter(const std::string& _parameter, const std::st
 				if (sscanf(_value.c_str(), "%fdB", &value) != 1) {
 					return false;
 				}
-				// TODO : Check if out of range ...
+				if (    value < -300
+				     || value > 300) {
+					AIRTALGO_ERROR("Can not set volume ... : '" << _parameter << "' out of range : [-300..300]");
+					return false;
+				}
 				it->setVolume(value);
 				AIRTALGO_DEBUG("Set volume : FLOW = " << value << " dB (from:" << _value << ")");
 				volumeChange();
diff --git a/airtalgo/Volume.h b/airtalgo/Volume.h
index c52b6c1..ab825da 100644
--- a/airtalgo/Volume.h
+++ b/airtalgo/Volume.h
@@ -74,8 +74,8 @@ namespace airtalgo {
 			                     void*& _output,
 			                     size_t& _outputNbChunk);
 		public:
-			virtual std::vector<airtalgo::format> getFormatSupportedInput();
-			virtual std::vector<airtalgo::format> getFormatSupportedOutput();
+			virtual std::vector<audio::format> getFormatSupportedInput();
+			virtual std::vector<audio::format> getFormatSupportedOutput();
 		public:
 			virtual void addVolumeStage(const std::shared_ptr<airtalgo::VolumeElement>& _volume);
 			virtual bool setParameter(const std::string& _parameter, const std::string& _value);
diff --git a/airtalgo/airtalgo.h b/airtalgo/airtalgo.h
index fda10d3..7aedf87 100644
--- a/airtalgo/airtalgo.h
+++ b/airtalgo/airtalgo.h
@@ -8,7 +8,7 @@
 #define __AIRT_ALGO_CORE_H__
 
 #include <string>
-#include <airtalgo/format.h>
+#include <audio/format.h>
 #include <airtalgo/channel.h>
 #include <chrono>
 
diff --git a/airtalgo/channel.cpp b/airtalgo/channel.cpp
deleted file mode 100644
index 5a04871..0000000
--- a/airtalgo/channel.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/** @file
- * @author Edouard DUPIN 
- * @copyright 2011, Edouard DUPIN, all right reserved
- * @license APACHE v2.0 (see license file)
- */
-
-#include <airtalgo/channel.h>
-#include "debug.h"
-
-
-std::ostream& airtalgo::operator <<(std::ostream& _os, enum airtalgo::channel _obj) {
-	_os << getChannelString(_obj);
-	return _os;
-}
-
-std::string airtalgo::getChannelString(enum airtalgo::channel _value) {
-	switch (_value) {
-		case channel_frontLeft:
-			return "front-left";
-			break;
-		case channel_frontCenter:
-			return "front-center";
-			break;
-		case channel_frontRight:
-			return "front-right";
-			break;
-		case channel_rearLeft:
-			return "rear-left";
-			break;
-		case channel_rearCenter:
-			return "rear-center";
-			break;
-		case channel_rearRight:
-			return "rear-right";
-			break;
-		case channel_surroundLeft:
-			return "surround-left";
-			break;
-		case channel_surroundRight:
-			return "surround-right";
-			break;
-		case channel_subWoofer:
-			return "sub-woofer";
-			break;
-		case channel_lfe:
-			return "lfe";
-			break;
-	};
-}
-
-std::string airtalgo::getChannelString(const std::vector<enum airtalgo::channel>& _value) {
-	std::string out;
-	for (size_t iii=0; iii<_value.size(); ++iii) {
-		if (iii != 0) {
-			out += ";";
-		}
-		out += getChannelString(_value[iii]);
-	}
-	return out;
-}
-
-
-std::ostream& airtalgo::operator <<(std::ostream& _os, const std::vector<enum airtalgo::channel>& _obj) {
-	_os << std::string("{");
-	for (size_t iii=0; iii<_obj.size(); ++iii) {
-		if (iii!=0) {
-			_os << std::string(";");
-		}
-		_os << _obj[iii];
-	}
-	_os << std::string("}");
-	return _os;
-}
-
-std::ostream& airtalgo::operator <<(std::ostream& _os, const std::vector<std::vector<enum airtalgo::channel>>& _obj) {
-	_os << std::string("{");
-	for (size_t iii=0; iii<_obj.size(); ++iii) {
-		if (iii!=0) {
-			_os << std::string(";");
-		}
-		_os << _obj[iii];
-	}
-	_os << std::string("}");
-	return _os;
-}
-
-static std::vector<std::string> split(const std::string& _input, char _val) {
-	std::vector<std::string> list;
-	size_t lastStartPos = 0;
-	for(size_t iii=0; iii<_input.size(); iii++) {
-		if (_input[iii]==_val) {
-			list.push_back(std::string(_input, lastStartPos, iii - lastStartPos));
-			lastStartPos = iii+1;
-		}
-	}
-	if (lastStartPos<_input.size()) {
-		list.push_back(std::string(_input, lastStartPos));
-	}
-	return list;
-}
-
-std::vector<enum airtalgo::channel> airtalgo::getChannelFromString(const std::string& _value) {
-	std::vector<enum airtalgo::channel> out;
-	std::vector<std::string> listIO = split(_value, ';');
-	for (size_t iii=0; iii<listIO.size(); ++iii) {
-		if (listIO[iii] == "front-left") {
-			out.push_back(channel_frontLeft);
-		} else if (listIO[iii] == "front-right") {
-			out.push_back(channel_frontRight);
-		} else if (listIO[iii] == "front-center") {
-			out.push_back(channel_frontCenter);
-		} else if (listIO[iii] == "rear-left") {
-			out.push_back(channel_rearLeft);
-		} else if (listIO[iii] == "rear-right") {
-			out.push_back(channel_rearRight);
-		} else if (listIO[iii] == "rear-center") {
-			out.push_back(channel_rearCenter);
-		} else if (listIO[iii] == "surround-right") {
-			out.push_back(channel_surroundLeft);
-		} else if (listIO[iii] == "surround-left") {
-			out.push_back(channel_surroundRight);
-		} else if (listIO[iii] == "lfe") {
-			out.push_back(channel_lfe);
-		} else if (listIO[iii] == "sub-woofer") {
-			out.push_back(channel_subWoofer);
-		} else {
-			//ROS_ERROR("Unknow: '%s' in [front-left;front-right;front-center;rear-left;rear-right;rear-center;surround-right;surround-left;lfe;subwoofer]", listIO[iii].c_str());
-		}
-	}
-	return out;
-}
diff --git a/airtalgo/channel.h b/airtalgo/channel.h
deleted file mode 100644
index a2bc8a5..0000000
--- a/airtalgo/channel.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/** @file
- * @author Edouard DUPIN 
- * @copyright 2011, Edouard DUPIN, all right reserved
- * @license APACHE v2.0 (see license file)
- */
-
-#ifndef __AIRT_ALGO_CORE_CHANNEL_H__
-#define __AIRT_ALGO_CORE_CHANNEL_H__
-
-#include <string>
-#include <vector>
-
-namespace airtalgo{
-	enum channel {
-		channel_frontLeft, //!< channel Front Left
-		channel_frontCenter, //!< channel Front Center
-		channel_frontRight, //!< channel Front Right
-		channel_rearLeft, //!< channel rear Left
-		channel_rearCenter, //!< channel rear Center
-		channel_rearRight, //!< channel rear Right
-		channel_surroundLeft, //!< channel surround Left
-		channel_surroundRight, //!< channel surround Right
-		channel_subWoofer, //!< channel Sub-woofer
-		channel_lfe, //!< channel Low frequency
-	};
-	std::string getChannelString(enum airtalgo::channel);
-	std::string getChannelString(const std::vector<enum airtalgo::channel>&);
-	std::vector<enum airtalgo::channel> getChannelFromString(const std::string& _value);
-	std::ostream& operator <<(std::ostream& _os, enum airtalgo::channel _obj);
-	std::ostream& operator <<(std::ostream& _os, const std::vector<enum airtalgo::channel>& _obj);
-	std::ostream& operator <<(std::ostream& _os, const std::vector<std::vector<enum airtalgo::channel>>& _obj);
-};
-
-
-#endif
diff --git a/airtalgo/format.cpp b/airtalgo/format.cpp
deleted file mode 100644
index e2273eb..0000000
--- a/airtalgo/format.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-/** @file
- * @author Edouard DUPIN 
- * @copyright 2011, Edouard DUPIN, all right reserved
- * @license APACHE v2.0 (see license file)
- */
-
-#include "debug.h"
-#include <airtalgo/format.h>
-
-std::ostream& airtalgo::operator <<(std::ostream& _os, enum airtalgo::format _obj) {
-	_os << getFormatString(_obj);
-	return _os;
-}
-
-std::ostream& airtalgo::operator <<(std::ostream& _os, const std::vector<enum airtalgo::format>& _obj) {
-	_os << std::string("{");
-	for (size_t iii=0; iii<_obj.size(); ++iii) {
-		if (iii!=0) {
-			_os << std::string(";");
-		}
-		_os << _obj[iii];
-	}
-	_os << std::string("}");
-	return _os;
-}
-
-std::string airtalgo::getFormatString(enum airtalgo::format _value) {
-	switch (_value) {
-		case format_unknow:
-			return "format_unknow";
-			break;
-		case format_int16:
-			return "format_int16";
-			break;
-		case format_int16_on_int32:
-			return "format_int16_on_int32";
-			break;
-		case format_int32:
-			return "format_int32";
-			break;
-		case format_float:
-			return "format_float";
-			break;
-	};
-}
-
-enum airtalgo::format airtalgo::getFormatFromString(const std::string& _value) {
-	if (_value == "format_int16") {
-		return format_int16;
-	}
-	if (_value == "format_int16_on_int32") {
-		return format_int16_on_int32;
-	}
-	if (_value == "format_int32") {
-		return format_int32;
-	}
-	if (_value == "format_float") {
-		return format_float;
-	}
-	return format_unknow;
-}
\ No newline at end of file
diff --git a/airtalgo/format.h b/airtalgo/format.h
deleted file mode 100644
index fd768a7..0000000
--- a/airtalgo/format.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/** @file
- * @author Edouard DUPIN 
- * @copyright 2011, Edouard DUPIN, all right reserved
- * @license APACHE v2.0 (see license file)
- */
-
-#ifndef __AIRT_ALGO_CORE_FORMAT_H__
-#define __AIRT_ALGO_CORE_FORMAT_H__
-
-#include <string>
-
-namespace airtalgo{
-	enum format {
-		format_unknow,
-		format_int16, //!< Signed 16 bits
-		format_int16_on_int32, //!< Signed 16 bits on 32bits data (16 bit fixpoint value)
-		format_int32, //!< Signed 32 bits
-		format_float, //!< Floating point (single precision)
-	};
-	std::string getFormatString(enum airtalgo::format);
-	enum airtalgo::format getFormatFromString(const std::string& _value);
-	std::ostream& operator <<(std::ostream& _os, enum airtalgo::format _obj);
-	std::ostream& operator <<(std::ostream& _os, const std::vector<enum airtalgo::format>& _obj);
-};
-
-
-#endif
-
diff --git a/lutin_airtalgo.py b/lutin_airtalgo.py
index 2a5e7aa..b3bef0f 100644
--- a/lutin_airtalgo.py
+++ b/lutin_airtalgo.py
@@ -14,13 +14,11 @@ def create(target):
 		'airtalgo/debug.cpp',
 		'airtalgo/airtalgo.cpp',
 		'airtalgo/Algo.cpp',
-		'airtalgo/channel.cpp',
 		'airtalgo/ChannelReorder.cpp',
 		'airtalgo/EndPointCallback.cpp',
 		'airtalgo/EndPoint.cpp',
 		'airtalgo/EndPointRead.cpp',
 		'airtalgo/EndPointWrite.cpp',
-		'airtalgo/format.cpp',
 		'airtalgo/FormatUpdate.cpp',
 		'airtalgo/Process.cpp',
 		'airtalgo/Resampler.cpp',
@@ -31,7 +29,7 @@ def create(target):
 	
 	# TODO: myModule.add_optional_module_depend('speexdsp', "HAVE_SPEEX_DSP_RESAMPLE")
 	myModule.compile_flags_CC("-DHAVE_SPEEX_DSP_RESAMPLE")
-	myModule.add_module_depend(['etk', 'speexdsp'])
+	myModule.add_module_depend(['etk', 'audio', 'speexdsp'])
 	myModule.add_export_path(tools.get_current_path(__file__))
 	
 	# add the currrent module at the