diff --git a/audio/river/Interface.cpp b/audio/river/Interface.cpp
index b92a44b..a0cbd53 100644
--- a/audio/river/Interface.cpp
+++ b/audio/river/Interface.cpp
@@ -12,9 +12,7 @@
 #include <audio/drain/EndPointRead.hpp>
 #include <audio/drain/Volume.hpp>
 
-audio::river::Interface::Interface(void) :
-  m_node(),
-  m_name("") {
+audio::river::Interface::Interface(void) {
 	static uint32_t uid = 0;
 	m_uid = uid++;
 	
@@ -460,19 +458,19 @@ void audio::river::Interface::systemVolumeChange() {
 	algo->volumeChange();
 }
 
-static void link(etk::FSNode& _node, const etk::String& _first, const etk::String& _op, const etk::String& _second, bool _isLink=true) {
+static void link(ememory::SharedPtr<etk::io::Interface>& _io, const etk::String& _first, const etk::String& _op, const etk::String& _second, bool _isLink=true) {
 	if (_op == "->") {
 		if (_isLink) {
-			_node << "			" << _first << " -> " << _second << ";\n";
+			*_io << "			" << _first << " -> " << _second << ";\n";
 		} else {
-			_node << "			" << _first << " -> " << _second << " [style=dashed];\n";
+			*_io << "			" << _first << " -> " << _second << " [style=dashed];\n";
 		}
 	} else if (_op == "<-") {
-		_node << "			" << _first << " -> " <<_second<< " [color=transparent];\n";
+		*_io << "			" << _first << " -> " <<_second<< " [color=transparent];\n";
 		if (_isLink) {
-			_node << "			" << _second << " -> " << _first << " [constraint=false];\n";
+			*_io << "			" << _second << " -> " << _first << " [constraint=false];\n";
 		} else {
-			_node << "			" << _second << " -> " << _first << " [constraint=false, style=dashed];\n";
+			*_io << "			" << _second << " -> " << _first << " [constraint=false, style=dashed];\n";
 		}
 	}
 }
@@ -488,37 +486,37 @@ etk::String audio::river::Interface::getDotNodeName() const {
 	return "error";
 }
 
-void audio::river::Interface::generateDot(etk::FSNode& _node, const etk::String& _nameIO, bool _isLink) {
-	_node << "	subgraph clusterInterface_" << m_uid << " {\n";
-	_node << "		color=orange;\n";
-	_node << "		label=\"[" << m_uid << "] Interface : " << m_name << "\";\n";
+void audio::river::Interface::generateDot(ememory::SharedPtr<etk::io::Interface>& _io, const etk::String& _nameIO, bool _isLink) {
+	*_io << "	subgraph clusterInterface_" << m_uid << " {\n";
+	*_io << "		color=orange;\n";
+	*_io << "		label=\"[" << m_uid << "] Interface : " << m_name << "\";\n";
 	etk::String nameIn;
 	etk::String nameOut;
 	if (    m_mode == audio::river::modeInterface_input
 	     || m_mode == audio::river::modeInterface_feedback) {
-		m_process.generateDot(_node, 3, 10000+m_uid, nameIn, nameOut, false);
+		m_process.generateDot(_io, 3, 10000+m_uid, nameIn, nameOut, false);
 	} else {
-		m_process.generateDot(_node, 3, 10000+m_uid, nameOut, nameIn, true);
+		m_process.generateDot(_io, 3, 10000+m_uid, nameOut, nameIn, true);
 	}
 	
 	
 	if (    m_mode == audio::river::modeInterface_input
 	     || m_mode == audio::river::modeInterface_feedback) {
-		link(_node, _nameIO,                                           "->", nameIn, _isLink);
+		link(_io, _nameIO,                                           "->", nameIn, _isLink);
 	} else {
-		link(_node, _nameIO,                                            "<-", nameOut, _isLink);
+		link(_io, _nameIO,                                            "<-", nameOut, _isLink);
 	}
-	_node << "		node [shape=Mdiamond];\n";
+	*_io << "		node [shape=Mdiamond];\n";
 	if (m_mode == audio::river::modeInterface_input) {
-		_node << "			" << getDotNodeName() << " [ label=\"API\\nINPUT\" ];\n";
-		link(_node, nameOut, "->", getDotNodeName());
+		*_io << "			" << getDotNodeName() << " [ label=\"API\\nINPUT\" ];\n";
+		link(_io, nameOut, "->", getDotNodeName());
 	} else if (m_mode == audio::river::modeInterface_feedback) {
-		_node << "			" << getDotNodeName() << " [ label=\"API\\nFEEDBACK\" ];\n";
-		link(_node, nameOut, "->", getDotNodeName());
+		*_io << "			" << getDotNodeName() << " [ label=\"API\\nFEEDBACK\" ];\n";
+		link(_io, nameOut, "->", getDotNodeName());
 	} else if (m_mode == audio::river::modeInterface_output) {
-		_node << "			" << getDotNodeName() << " [ label=\"API\\nOUTPUT\" ];\n";
-		link(_node, nameIn, "<-", getDotNodeName());
+		*_io << "			" << getDotNodeName() << " [ label=\"API\\nOUTPUT\" ];\n";
+		link(_io, nameIn, "<-", getDotNodeName());
 	}
-	_node << "	}\n	\n";
+	*_io << "	}\n	\n";
 }
 
diff --git a/audio/river/Interface.hpp b/audio/river/Interface.hpp
index 0904764..41008ad 100644
--- a/audio/river/Interface.hpp
+++ b/audio/river/Interface.hpp
@@ -18,7 +18,6 @@
 #include <audio/drain/EndPointCallback.hpp>
 #include <audio/drain/EndPointWrite.hpp>
 #include <ejson/ejson.hpp>
-#include <etk/os/FSNode.hpp>
 #include <audio/Time.hpp>
 
 namespace audio {
@@ -298,11 +297,11 @@ namespace audio {
 			public:
 				/**
 				 * @brief Create the dot in the FileNode stream.
-				 * @param[in,out] _node File node to write data.
+				 * @param[in,out] _io File interafce to write data.
 				 * @param[in] _nameIO Name to link the interface node
 				 * @param[in] _isLink True if the node is connected on the current interface.
 				 */
-				virtual void generateDot(etk::FSNode& _node, const etk::String& _nameIO, bool _isLink=true);
+				virtual void generateDot(ememory::SharedPtr<etk::io::Interface>& _io, const etk::String& _nameIO, bool _isLink=true);
 				/**
 				 * @brief Get the current 'dot' name of the interface
 				 * @return The anme requested.
diff --git a/audio/river/io/Group.cpp b/audio/river/io/Group.cpp
index a4c0050..5978248 100644
--- a/audio/river/io/Group.cpp
+++ b/audio/river/io/Group.cpp
@@ -130,11 +130,11 @@ void audio::river::io::Group::stop() {
 	}
 }
 
-void audio::river::io::Group::generateDot(etk::FSNode& _node, bool _hardwareNode) {
+void audio::river::io::Group::generateDot(ememory::SharedPtr<etk::io::Interface>& _io, bool _hardwareNode) {
 	for (size_t iii=0; iii<m_list.size(); ++iii) {
 		if (m_list[iii] != null) {
 			if (m_list[iii]->isHarwareNode() == _hardwareNode) {
-				m_list[iii]->generateDot(_node);
+				m_list[iii]->generateDot(_io);
 			}
 		}
 	}
diff --git a/audio/river/io/Group.hpp b/audio/river/io/Group.hpp
index 930871e..2a15e37 100644
--- a/audio/river/io/Group.hpp
+++ b/audio/river/io/Group.hpp
@@ -9,7 +9,7 @@
 #include <etk/String.hpp>
 #include <etk/Vector.hpp>
 #include <ejson/ejson.hpp>
-#include <etk/os/FSNode.hpp>
+#include <etk/io/Interface.hpp>
 
 namespace audio {
 	namespace river {
@@ -65,7 +65,7 @@ namespace audio {
 					 * @param[in] _hardwareNode true if user want only display the hardware
 					 *                          node and not the software node. false The oposite.
 					 */
-					void generateDot(etk::FSNode& _node, bool _hardwareNode);
+					void generateDot(ememory::SharedPtr<etk::io::Interface>& _node, bool _hardwareNode);
 			};
 		}
 	}
diff --git a/audio/river/io/Manager.cpp b/audio/river/io/Manager.cpp
index 2c69fff..f6eb5d7 100644
--- a/audio/river/io/Manager.cpp
+++ b/audio/river/io/Manager.cpp
@@ -12,9 +12,10 @@
 #include <audio/river/io/NodeMuxer.hpp>
 #include <audio/river/io/NodeOrchestra.hpp>
 #include <audio/river/io/NodePortAudio.hpp>
-#include <etk/os/FSNode.hpp>
 #include <ememory/memory.hpp>
 #include <etk/types.hpp>
+#include <etk/path/fileSystem.hpp>
+#include <etk/uri/uri.hpp>
 
 #ifdef AUDIO_RIVER_BUILD_PORTAUDIO
 	extern "C" {
@@ -56,7 +57,7 @@ static etk::String basicAutoConfig =
 	"}\n";
 
 
-static etk::String pathToTheRiverConfigInHome("HOME:.local/share/audio-river/config.json");
+static etk::Uri pathToTheRiverConfigInHome(etk::path::getHomePath() / ".local" / "share" / "audio-river" / "config.json");
 
 audio::river::io::Manager::Manager() {
 	#ifdef AUDIO_RIVER_BUILD_PORTAUDIO
@@ -67,18 +68,18 @@ audio::river::io::Manager::Manager() {
 	#endif
 }
 
-void audio::river::io::Manager::init(const etk::String& _filename) {
+void audio::river::io::Manager::init(const etk::Uri& _uri) {
 	RIVER_ERROR("kjqsdhfkjqshdfkjqhsdskjdfhfkqjshqhskdjfhqsdfqsdqsdfqsdqsdfqsdfqsdfqsdfqsdfqsd");
 	ethread::RecursiveLock lock(m_mutex);
-	if (_filename == "") {
+	if (_uri.isEmpty() == true) {
 		if (m_config.load(pathToTheRiverConfigInHome) == false) {
 			RIVER_INFO("Load default config");
 			m_config.parse(basicAutoConfig);
 		} else {
 			RIVER_INFO("Load default user configuration: " << pathToTheRiverConfigInHome);
 		}
-	} else if (m_config.load(_filename) == false) {
-		RIVER_ERROR("you must set a basic configuration file for harware configuration: '" << _filename << "'");
+	} else if (m_config.load(_uri) == false) {
+		RIVER_ERROR("you must set a basic configuration file for harware configuration: " << _uri);
 	}
 }
 
@@ -349,16 +350,16 @@ bool audio::river::io::Manager::getMute(const etk::String& _volumeName) {
 	return volume->getMute();
 }
 
-void audio::river::io::Manager::generateDot(const etk::String& _filename) {
+void audio::river::io::Manager::generateDot(const etk::Uri& _uri) {
 	ethread::RecursiveLock lock(m_mutex);
-	etk::FSNode node(_filename);
-	RIVER_INFO("Generate the DOT files: " << node);
-	if (node.fileOpenWrite() == false) {
-		RIVER_ERROR("Can not Write the dot file (fail to open) : " << node);
+	ememory::SharedPtr<etk::io::Interface> ioFile = etk::uri::get(_uri);
+	RIVER_INFO("Generate the DOT files: " << _uri);
+	if (ioFile->open(etk::io::OpenMode::Write) == false) {
+		RIVER_ERROR("Can not Write the dot file (fail to open) : " << _uri);
 		return;
 	}
-	node << "digraph G {" << "\n";
-	node << "	rankdir=\"LR\";\n";
+	*ioFile << "digraph G {" << "\n";
+	*ioFile << "	rankdir=\"LR\";\n";
 	// First Step : Create all HW interface:
 	{
 		// standalone
@@ -366,7 +367,7 @@ void audio::river::io::Manager::generateDot(const etk::String& _filename) {
 			ememory::SharedPtr<audio::river::io::Node> val = m_list[iii].lock();
 			if (val != null) {
 				if (val->isHarwareNode() == true) {
-					val->generateDot(node);
+					val->generateDot(ioFile);
 				}
 			}
 		}
@@ -374,7 +375,7 @@ void audio::river::io::Manager::generateDot(const etk::String& _filename) {
 		     it != m_listGroup.end();
 		     ++it) {
 			if (it->second != null) {
-				it->second->generateDot(node, true);
+				it->second->generateDot(ioFile, true);
 			}
 		}
 	}
@@ -385,7 +386,7 @@ void audio::river::io::Manager::generateDot(const etk::String& _filename) {
 			ememory::SharedPtr<audio::river::io::Node> val = m_list[iii].lock();
 			if (val != null) {
 				if (val->isHarwareNode() == false) {
-					val->generateDot(node);
+					val->generateDot(ioFile);
 				}
 			}
 		}
@@ -393,14 +394,14 @@ void audio::river::io::Manager::generateDot(const etk::String& _filename) {
 		     it != m_listGroup.end();
 		     ++it) {
 			if (it->second != null) {
-				it->second->generateDot(node, false);
+				it->second->generateDot(ioFile, false);
 			}
 		}
 	}
 	
-	node << "}" << "\n";
-	node.fileClose();
-	RIVER_INFO("Generate the DOT files: " << node << " (DONE)");
+	*ioFile << "}" << "\n";
+	ioFile->close();
+	RIVER_INFO("Generate the DOT files: " << _uri << " (DONE)");
 }
 
 ememory::SharedPtr<audio::river::io::Group> audio::river::io::Manager::getGroup(const etk::String& _name) {
diff --git a/audio/river/io/Manager.hpp b/audio/river/io/Manager.hpp
index e1419d3..7699225 100644
--- a/audio/river/io/Manager.hpp
+++ b/audio/river/io/Manager.hpp
@@ -42,9 +42,9 @@ namespace audio {
 					~Manager();
 					/**
 					 * @brief Called by audio::river::init() to set the hardware configuration file.
-					 * @param[in] _filename Name of the file to initialize.
+					 * @param[in] _uri Uri file to initialize.
 					 */
-					void init(const etk::String& _filename);
+					void init(const etk::Uri& _uri);
 					/**
 					 * @brief Called by audio::river::initString() to set the hardware configuration string.
 					 * @param[in] _data json configuration string.
@@ -132,9 +132,9 @@ namespace audio {
 					bool getMute(const etk::String& _volumeName);
 					/**
 					 * @brief Generate the dot file corresponding at the actif nodes.
-					 * @param[in] _filename Name of the file to write data.
+					 * @param[in] _uri Uri of the file to write data.
 					 */
-					void generateDot(const etk::String& _filename);
+					void generateDot(const etk::Uri& _uri);
 				private:
 					etk::Map<etk::String, ememory::SharedPtr<audio::river::io::Group> > m_listGroup; //!< List of all groups
 					/**
diff --git a/audio/river/io/Node.cpp b/audio/river/io/Node.cpp
index a0bbae5..6803d55 100644
--- a/audio/river/io/Node.cpp
+++ b/audio/river/io/Node.cpp
@@ -391,63 +391,63 @@ void audio::river::io::Node::newOutput(void* _outputBuffer,
 	return;
 }
 
-static void link(etk::FSNode& _node, const etk::String& _first, const etk::String& _op, const etk::String& _second) {
+static void link(ememory::SharedPtr<etk::io::Interface>& _io, const etk::String& _first, const etk::String& _op, const etk::String& _second) {
 	if (_op == "->") {
-		_node << "			" << _first << " -> " << _second << ";\n";
+		*_io << "			" << _first << " -> " << _second << ";\n";
 	} else if (_op == "<-") {
-		_node << "			" << _first << " -> " <<_second<< " [color=transparent];\n";
-		_node << "			" << _second << " -> " << _first << " [constraint=false];\n";
+		*_io << "			" << _first << " -> " <<_second<< " [color=transparent];\n";
+		*_io << "			" << _second << " -> " << _first << " [constraint=false];\n";
 	}
 }
 
 
-void audio::river::io::Node::generateDot(etk::FSNode& _node) {
-	_node << "	subgraph clusterNode_" << m_uid << " {\n";
-	_node << "		color=blue;\n";
-	_node << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
+void audio::river::io::Node::generateDot(ememory::SharedPtr<etk::io::Interface>& _io) {
+	*_io << "	subgraph clusterNode_" << m_uid << " {\n";
+	*_io << "		color=blue;\n";
+	*_io << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
 	if (m_isInput == true) {
-		_node << "		node [shape=rarrow];\n";
-		_node << "			NODE_" << m_uid << "_HW_interface [ label=\"HW interface\\n interface=ALSA\\n stream=" << m_name << "\\n type=input\" ];\n";
+		*_io << "		node [shape=rarrow];\n";
+		*_io << "			NODE_" << m_uid << "_HW_interface [ label=\"HW interface\\n interface=ALSA\\n stream=" << m_name << "\\n type=input\" ];\n";
 		etk::String nameIn;
 		etk::String nameOut;
-		m_process.generateDotProcess(_node, 3, m_uid, nameIn, nameOut, false);
-		_node << "		node [shape=square];\n";
-		_node << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
+		m_process.generateDotProcess(_io, 3, m_uid, nameIn, nameOut, false);
+		*_io << "		node [shape=square];\n";
+		*_io << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
 		// Link all nodes :
-		_node << "			NODE_" << m_uid << "_HW_interface -> " << nameIn << " [arrowhead=\"open\"];\n";
-		_node << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer [arrowhead=\"open\"];\n";
+		*_io << "			NODE_" << m_uid << "_HW_interface -> " << nameIn << " [arrowhead=\"open\"];\n";
+		*_io << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer [arrowhead=\"open\"];\n";
 	} else {
 		size_t nbOutput = getNumberOfInterfaceAvaillable(audio::river::modeInterface_output);
 		size_t nbfeedback = getNumberOfInterfaceAvaillable(audio::river::modeInterface_feedback);
-		_node << "		node [shape=larrow];\n";
-		_node << "			NODE_" << m_uid << "_HW_interface [ label=\"HW interface\\n interface=ALSA\\n stream=" << m_name << "\\n type=output\" ];\n";
+		*_io << "		node [shape=larrow];\n";
+		*_io << "			NODE_" << m_uid << "_HW_interface [ label=\"HW interface\\n interface=ALSA\\n stream=" << m_name << "\\n type=output\" ];\n";
 		etk::String nameIn;
 		etk::String nameOut;
 		if (nbOutput>0) {
-			m_process.generateDotProcess(_node, 3, m_uid, nameIn, nameOut, true);
+			m_process.generateDotProcess(_io, 3, m_uid, nameIn, nameOut, true);
 		}
-		_node << "		node [shape=square];\n";
+		*_io << "		node [shape=square];\n";
 		if (nbOutput>0) {
-			_node << "			NODE_" << m_uid << "_muxer [ label=\"MUXER\\n format=" << etk::toString(m_process.getInputConfig().getFormat()) << "\" ];\n";
+			*_io << "			NODE_" << m_uid << "_muxer [ label=\"MUXER\\n format=" << etk::toString(m_process.getInputConfig().getFormat()) << "\" ];\n";
 		}
 		if (nbfeedback>0) {
-			_node << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
+			*_io << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
 		}
 		// Link all nodes :
 		if (nbOutput>0) {
-			link(_node, "NODE_" + etk::toString(m_uid) + "_HW_interface", "<-", nameOut);
-			link(_node, nameIn, "<-", "NODE_" + etk::toString(m_uid) + "_muxer");
+			link(_io, "NODE_" + etk::toString(m_uid) + "_HW_interface", "<-", nameOut);
+			link(_io, nameIn, "<-", "NODE_" + etk::toString(m_uid) + "_muxer");
 		}
 		if (nbfeedback>0) {
-			_node << "			NODE_" << m_uid << "_HW_interface -> NODE_" << m_uid << "_demuxer [arrowhead=\"open\"];\n";
+			*_io << "			NODE_" << m_uid << "_HW_interface -> NODE_" << m_uid << "_demuxer [arrowhead=\"open\"];\n";
 		}
 		if (    nbOutput>0
 		     && nbfeedback>0) {
-			_node << "			{ rank=same; NODE_" << m_uid << "_demuxer; NODE_" << m_uid << "_muxer }\n";
+			*_io << "			{ rank=same; NODE_" << m_uid << "_demuxer; NODE_" << m_uid << "_muxer }\n";
 		}
 		
 	}
-	_node << "	}\n	\n";
+	*_io << "	}\n	\n";
 	
 	for (size_t iii=0; iii< m_listAvaillable.size(); ++iii) {
 		if (m_listAvaillable[iii].expired() == true) {
@@ -465,11 +465,11 @@ void audio::river::io::Node::generateDot(etk::FSNode& _node) {
 		}
 		if (element != null) {
 			if (element->getMode() == modeInterface_input) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else if (element->getMode() == modeInterface_output) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
 			} else if (element->getMode() == modeInterface_feedback) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else {
 				
 			}
diff --git a/audio/river/io/Node.hpp b/audio/river/io/Node.hpp
index 6e17c54..75d8801 100644
--- a/audio/river/io/Node.hpp
+++ b/audio/river/io/Node.hpp
@@ -15,7 +15,7 @@
 #include <audio/river/Interface.hpp>
 #include <audio/drain/IOFormatInterface.hpp>
 #include <audio/drain/Volume.hpp>
-#include <etk/os/FSNode.hpp>
+#include <etk/io/Interface.hpp>
 
 namespace audio {
 	namespace river {
@@ -209,9 +209,9 @@ namespace audio {
 				public:
 					/**
 					 * @brief Generate the node dot file section
-					 * @param[in] _node File node to generate the data.
+					 * @param[in] _io File interface to dump data.
 					 */
-					virtual void generateDot(etk::FSNode& _node);
+					virtual void generateDot(ememory::SharedPtr<etk::io::Interface>& _io);
 			};
 		}
 	}
diff --git a/audio/river/io/NodeAEC.cpp b/audio/river/io/NodeAEC.cpp
index ba002d1..609ec25 100644
--- a/audio/river/io/NodeAEC.cpp
+++ b/audio/river/io/NodeAEC.cpp
@@ -316,27 +316,27 @@ void audio::river::io::NodeAEC::processAEC(void* _dataMic, void* _dataFB, uint32
 }
 
 
-void audio::river::io::NodeAEC::generateDot(etk::FSNode& _node) {
-	_node << "	subgraph clusterNode_" << m_uid << " {\n";
-	_node << "		color=blue;\n";
-	_node << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
-		_node << "			NODE_" << m_uid << "_HW_AEC [ label=\"AEC\\n channelMap=" << etk::toString(getInterfaceFormat().getMap()) << "\" ];\n";
+void audio::river::io::NodeAEC::generateDot(ememory::SharedPtr<etk::io::Interface>& _io) {
+	*_io << "	subgraph clusterNode_" << m_uid << " {\n";
+	*_io << "		color=blue;\n";
+	*_io << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
+		*_io << "			NODE_" << m_uid << "_HW_AEC [ label=\"AEC\\n channelMap=" << etk::toString(getInterfaceFormat().getMap()) << "\" ];\n";
 		etk::String nameIn;
 		etk::String nameOut;
-		m_process.generateDot(_node, 3, m_uid, nameIn, nameOut, false);
-		_node << "		node [shape=square];\n";
-		_node << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
+		m_process.generateDot(_io, 3, m_uid, nameIn, nameOut, false);
+		*_io << "		node [shape=square];\n";
+		*_io << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
 		// Link all nodes :
-		_node << "			NODE_" << m_uid << "_HW_AEC -> " << nameIn << ";\n";
-		_node << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer;\n";
-	_node << "	}\n";
+		*_io << "			NODE_" << m_uid << "_HW_AEC -> " << nameIn << ";\n";
+		*_io << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer;\n";
+	*_io << "	}\n";
 	if (m_interfaceMicrophone != null) {
-		_node << "	" << m_interfaceMicrophone->getDotNodeName() << " -> NODE_" << m_uid << "_HW_AEC;\n";
+		*_io << "	" << m_interfaceMicrophone->getDotNodeName() << " -> NODE_" << m_uid << "_HW_AEC;\n";
 	}
 	if (m_interfaceFeedBack != null) {
-		_node << "	" << m_interfaceFeedBack->getDotNodeName() << " -> NODE_" << m_uid << "_HW_AEC;\n";
+		*_io << "	" << m_interfaceFeedBack->getDotNodeName() << " -> NODE_" << m_uid << "_HW_AEC;\n";
 	}
-	_node << "	\n";
+	*_io << "	\n";
 	
 	for (size_t iii=0; iii< m_listAvaillable.size(); ++iii) {
 		if (m_listAvaillable[iii].expired() == true) {
@@ -354,11 +354,11 @@ void audio::river::io::NodeAEC::generateDot(etk::FSNode& _node) {
 		}
 		if (element != null) {
 			if (element->getMode() == modeInterface_input) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else if (element->getMode() == modeInterface_output) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
 			} else if (element->getMode() == modeInterface_feedback) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else {
 				
 			}
diff --git a/audio/river/io/NodeAEC.hpp b/audio/river/io/NodeAEC.hpp
index 308bab8..2297228 100644
--- a/audio/river/io/NodeAEC.hpp
+++ b/audio/river/io/NodeAEC.hpp
@@ -87,7 +87,7 @@ namespace audio {
 					 */
 					void processAEC(void* _dataMic, void* _dataFB, uint32_t _nbChunk, const audio::Time& _time);
 				public:
-					virtual void generateDot(etk::FSNode& _node);
+					virtual void generateDot(ememory::SharedPtr<etk::io::Interface>& _io);
 				private:
 					int32_t m_nbChunk;
 					int32_t m_gainValue;
diff --git a/audio/river/io/NodeFile.cpp b/audio/river/io/NodeFile.cpp
index 7f76d87..89a3e4d 100644
--- a/audio/river/io/NodeFile.cpp
+++ b/audio/river/io/NodeFile.cpp
@@ -34,12 +34,12 @@ int32_t audio::river::io::NodeFile::playbackCallback(void* _outputBuffer,
 
 
 
-ememory::SharedPtr<audio::river::io::NodeFile> audio::river::io::NodeFile::create(const etk::String& _name, const ejson::Object& _config) {
-	return ememory::SharedPtr<audio::river::io::NodeFile>(ETK_NEW(audio::river::io::NodeFile, _name, _config));
+ememory::SharedPtr<audio::river::io::NodeFile> audio::river::io::NodeFile::create(const etk::Path& _path, const ejson::Object& _config) {
+	return ememory::SharedPtr<audio::river::io::NodeFile>(ETK_NEW(audio::river::io::NodeFile, _path, _config));
 }
 
-audio::river::io::NodeFile::NodeFile(const etk::String& _name, const ejson::Object& _config) :
-  Node(_name, _config) {
+audio::river::io::NodeFile::NodeFile(const etk::Path& _path, const ejson::Object& _config) :
+  Node(_path.getString(), _config) {
 	audio::drain::IOFormatInterface interfaceFormat = getInterfaceFormat();
 	audio::drain::IOFormatInterface hardwareFormat = getHarwareFormat();
 	/**
diff --git a/audio/river/io/NodeFile.hpp b/audio/river/io/NodeFile.hpp
index 5836cb1..ca2fbc1 100644
--- a/audio/river/io/NodeFile.hpp
+++ b/audio/river/io/NodeFile.hpp
@@ -24,9 +24,9 @@ namespace audio {
 					/**
 					 * @brief Constructor
 					 */
-					NodeFile(const etk::String& _name, const ejson::Object& _config);
+					NodeFile(const etk::Path& _path, const ejson::Object& _config);
 				public:
-					static ememory::SharedPtr<NodeFile> create(const etk::String& _name, const ejson::Object& _config);
+					static ememory::SharedPtr<NodeFile> create(const etk::Path& _path, const ejson::Object& _config);
 					/**
 					 * @brief Destructor
 					 */
@@ -36,7 +36,7 @@ namespace audio {
 					};
 				protected:
 					audio::Time m_time; //!< time of the flow
-					etk::FSNode m_file; //!< File interface
+					ememory::SharedPtr<etk::io::Interface>& m_file; //!< File interface
 					bool m_restartAtEnd; //!< The read is done in loop
 					uint32_t m_sampleRate; //!< Sample Rate of the Raw file
 					audio::format m_format; //!< Format of the file
diff --git a/audio/river/io/NodeMuxer.cpp b/audio/river/io/NodeMuxer.cpp
index 591dc19..e6b95a4 100644
--- a/audio/river/io/NodeMuxer.cpp
+++ b/audio/river/io/NodeMuxer.cpp
@@ -433,30 +433,30 @@ void audio::river::io::NodeMuxer::processMuxer(void* _dataIn1, void* _dataIn2, u
 }
 
 
-void audio::river::io::NodeMuxer::generateDot(etk::FSNode& _node) {
-	_node << "	subgraph clusterNode_" << m_uid << " {\n";
-	_node << "		color=blue;\n";
-	_node << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
+void audio::river::io::NodeMuxer::generateDot(ememory::SharedPtr<etk::io::Interface>& _io) {
+	*_io << "	subgraph clusterNode_" << m_uid << " {\n";
+	*_io << "		color=blue;\n";
+	*_io << "		label=\"[" << m_uid << "] IO::Node : " << m_name << "\";\n";
 
-		_node << "		node [shape=box];\n";
+		*_io << "		node [shape=box];\n";
 		// TODO : Create a structure ...
-		_node << "			NODE_" << m_uid << "_HW_MUXER [ label=\"Muxer\\n channelMap=" << etk::toString(getInterfaceFormat().getMap()) << "\" ];\n";
+		*_io << "			NODE_" << m_uid << "_HW_MUXER [ label=\"Muxer\\n channelMap=" << etk::toString(getInterfaceFormat().getMap()) << "\" ];\n";
 		etk::String nameIn;
 		etk::String nameOut;
-		m_process.generateDot(_node, 3, m_uid, nameIn, nameOut, false);
-		_node << "		node [shape=square];\n";
-		_node << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
+		m_process.generateDot(_io, 3, m_uid, nameIn, nameOut, false);
+		*_io << "		node [shape=square];\n";
+		*_io << "			NODE_" << m_uid << "_demuxer [ label=\"DEMUXER\\n format=" << etk::toString(m_process.getOutputConfig().getFormat()) << "\" ];\n";
 		// Link all nodes :
-		_node << "			NODE_" << m_uid << "_HW_MUXER -> " << nameIn << ";\n";
-		_node << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer;\n";
-	_node << "	}\n";
+		*_io << "			NODE_" << m_uid << "_HW_MUXER -> " << nameIn << ";\n";
+		*_io << "			" << nameOut << " -> NODE_" << m_uid << "_demuxer;\n";
+	*_io << "	}\n";
 	if (m_interfaceInput2 != null) {
-		_node << "	" << m_interfaceInput2->getDotNodeName() << " -> NODE_" << m_uid << "_HW_MUXER;\n";
+		*_io << "	" << m_interfaceInput2->getDotNodeName() << " -> NODE_" << m_uid << "_HW_MUXER;\n";
 	}
 	if (m_interfaceInput1 != null) {
-		_node << "	" << m_interfaceInput1->getDotNodeName() << " -> NODE_" << m_uid << "_HW_MUXER;\n";
+		*_io << "	" << m_interfaceInput1->getDotNodeName() << " -> NODE_" << m_uid << "_HW_MUXER;\n";
 	}
-	_node << "	\n";
+	*_io << "	\n";
 	for (size_t iii=0; iii< m_listAvaillable.size(); ++iii) {
 		if (m_listAvaillable[iii].expired() == true) {
 			continue;
@@ -473,15 +473,15 @@ void audio::river::io::NodeMuxer::generateDot(etk::FSNode& _node) {
 		}
 		if (element != null) {
 			if (element->getMode() == modeInterface_input) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else if (element->getMode() == modeInterface_output) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_muxer", isLink);
 			} else if (element->getMode() == modeInterface_feedback) {
-				element->generateDot(_node, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
+				element->generateDot(_io, "NODE_" + etk::toString(m_uid) + "_demuxer", isLink);
 			} else {
 				
 			}
 		}
 	}
-	_node << "\n";
+	*_io << "\n";
 }
diff --git a/audio/river/io/NodeMuxer.hpp b/audio/river/io/NodeMuxer.hpp
index 4f91cbd..c4e5390 100644
--- a/audio/river/io/NodeMuxer.hpp
+++ b/audio/river/io/NodeMuxer.hpp
@@ -56,7 +56,7 @@ namespace audio {
 					void processMuxer(void* _dataMic, void* _dataFB, uint32_t _nbChunk, const audio::Time& _time);
 					etk::Vector<uint8_t> m_data;
 				public:
-					virtual void generateDot(etk::FSNode& _node);
+					virtual void generateDot(ememory::SharedPtr<etk::io::Interface>& _io);
 				private:
 					void reorder(void* _output, uint32_t _nbChunk, void* _input, const etk::Vector<audio::channel>& _mapInput);
 			};
diff --git a/doc/read.md b/doc/read.md
index 04d5b3a..f854548 100644
--- a/doc/read.md
+++ b/doc/read.md
@@ -31,7 +31,7 @@ With a file:
 
 ```{.cpp}
 	// initialize river interface
-	river::init("DATA:configFileName.json");
+	river::init("DATA:///configFileName.json");
 ```
 
 With a json string:
diff --git a/sample/read/read.cpp b/sample/read/read.cpp
index 3306584..d34680b 100644
--- a/sample/read/read.cpp
+++ b/sample/read/read.cpp
@@ -10,11 +10,11 @@
 #include <audio/river/Manager.hpp>
 #include <audio/river/Interface.hpp>
 //! [audio_river_sample_include]
-#include <etk/os/FSNode.hpp>
 #include <etk/etk.hpp>
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
 #include <test-debug/debug.hpp>
+#include <etk/uri/uri.hpp>
 
 
 
@@ -44,14 +44,14 @@ void onDataReceived(const void* _data,
                     enum audio::format _format,
                     uint32_t _frequency,
                     const etk::Vector<audio::channel>& _map,
-                    etk::FSNode* _outputNode) {
+                    ememory::SharedPtr<etk::io::Interface> _fileIO) {
 	if (    _format != audio::format_int16
 	     && _format != audio::format_float) {
 		TEST_ERROR("Call wrong type ... (need int16_t.float)");
 		return;
 	}
 	//! [audio_river_sample_callback_implement]
-	if (_outputNode->fileIsOpen() == false) {
+	if (_fileIO->isOpen() == false) {
 		if (_format != audio::format_int16) {
 			// get the curent power of the signal.
 			const int16_t* data = static_cast<const int16_t*>(_data);
@@ -74,7 +74,7 @@ void onDataReceived(const void* _data,
 	} else {
 		// just write data
 		TEST_VERBOSE("Get data ... chunks=" << _nbChunk << " time=" << _time);
-		_outputNode->fileWrite(_data, _map.size()*audio::getFormatBytes(_format), _nbChunk);
+		_fileIO->write(_data, _map.size()*audio::getFormatBytes(_format), _nbChunk);
 	}
 }
 
@@ -86,7 +86,7 @@ int main(int _argc, const char **_argv) {
 	// local parameter:
 	etk::String configFile;
 	etk::String ioName="microphone";
-	etk::String outputFileName = "";
+	etk::Path outputFileName = "";
 	for (int32_t iii=0; iii<_argc ; ++iii) {
 		etk::String data = _argv[iii];
 		if (    data == "-h"
@@ -130,11 +130,10 @@ int main(int _argc, const char **_argv) {
 		return -1;
 	}
 	//! [audio_river_sample_create_read_interface]
-	etk::FSNode outputNode;
+	ememory::SharedPtr<etk::io::Interface> fileIO = etk::uri::get(outputFileName);
 	// open output file if needed:
-	if (outputFileName != "") {
-		outputNode.setName(outputFileName);
-		outputNode.fileOpenWrite();
+	if (outputFileName.isEmpty() == false) {
+		fileIO->open(etk::io::OpenMode::Write);
 	}
 	//! [audio_river_sample_set_callback]
 	// set callback mode ...
@@ -144,7 +143,7 @@ int main(int _argc, const char **_argv) {
 	                                enum audio::format _format,
 	                                uint32_t _frequency,
 	                                const etk::Vector<audio::channel>& _map) {
-	                                	onDataReceived(_data, _time, _nbChunk, _format, _frequency, _map, &outputNode);
+	                                	onDataReceived(_data, _time, _nbChunk, _format, _frequency, _map, fileIO);
 	                                });
 	//! [audio_river_sample_set_callback]
 	//! [audio_river_sample_read_start_stop]
@@ -162,7 +161,7 @@ int main(int _argc, const char **_argv) {
 	//! [audio_river_sample_read_reset]
 	// close the output file
 	if (outputFileName != "") {
-		outputNode.fileClose();
+		fileIO->close();
 	}
 	return 0;
 }
diff --git a/test/main.cpp b/test/main.cpp
index 75b79e7..af4e54e 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -32,7 +32,6 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
diff --git a/test/testAEC.cpp b/test/testAEC.cpp
index 75ebdb9..d6c7ea5 100644
--- a/test/testAEC.cpp
+++ b/test/testAEC.cpp
@@ -10,8 +10,6 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
-#include "main.hpp"
 extern "C" {
 	#include <math.h>
 }
diff --git a/test/testEchoDelay.cpp b/test/testEchoDelay.cpp
index 24c68b7..f4c9fdc 100644
--- a/test/testEchoDelay.cpp
+++ b/test/testEchoDelay.cpp
@@ -10,14 +10,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_echo_delay {
 	class TestClass {
@@ -202,7 +200,7 @@ namespace river_test_echo_delay {
 				if (_format != audio::format_int16) {
 					TEST_ERROR("call wrong type ... (need int16_t)");
 				}
-				TEST_SAVE_FILE_MACRO(int16_t, "REC_FeedBack.raw", _data, _nbChunk*_map.size());
+				//TEST_SAVE_FILE_MACRO(int16_t, "REC_FeedBack.raw", _data, _nbChunk*_map.size());
 				if (m_estimateVolumeInput == true) {
 					// nothing to do ...
 				} else {
@@ -257,7 +255,7 @@ namespace river_test_echo_delay {
 				if (_format != audio::format_int16) {
 					TEST_ERROR("call wrong type ... (need int16_t)");
 				}
-				TEST_SAVE_FILE_MACRO(int16_t, "REC_Microphone.raw", _data, _nbChunk*_map.size());
+				//TEST_SAVE_FILE_MACRO(int16_t, "REC_Microphone.raw", _data, _nbChunk*_map.size());
 				const int16_t* data = static_cast<const int16_t*>(_data);
 				if (m_estimateVolumeInput == true) {
 					m_stateMic ++;
diff --git a/test/testFormat.cpp b/test/testFormat.cpp
index 02d443c..e55f612 100644
--- a/test/testFormat.cpp
+++ b/test/testFormat.cpp
@@ -10,14 +10,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_format {
 	static const etk::String configurationRiver =
diff --git a/test/testMuxer.cpp b/test/testMuxer.cpp
index a368237..fd1bc2b 100644
--- a/test/testMuxer.cpp
+++ b/test/testMuxer.cpp
@@ -9,14 +9,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_muxer {
 	class TestClass {
@@ -100,7 +98,7 @@ namespace river_test_muxer {
 				if (_format != audio::format_int16) {
 					TEST_ERROR("call wrong type ... (need int16_t)");
 				}
-				TEST_SAVE_FILE_MACRO(int16_t, "REC_MicrophoneMuxed.raw", _data, _nbChunk*_map.size());
+				//TEST_SAVE_FILE_MACRO(int16_t, "REC_MicrophoneMuxed.raw", _data, _nbChunk*_map.size());
 				TEST_ERROR("Receive data ... " << _nbChunk << " map=" << _map);
 			}
 			void run() {
diff --git a/test/testPlaybackCallback.cpp b/test/testPlaybackCallback.cpp
index fdd9aa1..8ccfe93 100644
--- a/test/testPlaybackCallback.cpp
+++ b/test/testPlaybackCallback.cpp
@@ -10,14 +10,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_playback_callback {
 	
diff --git a/test/testPlaybackWrite.cpp b/test/testPlaybackWrite.cpp
index 7d0dded..f1be1df 100644
--- a/test/testPlaybackWrite.cpp
+++ b/test/testPlaybackWrite.cpp
@@ -10,14 +10,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_playback_write {
 	static const etk::String configurationRiver =
diff --git a/test/testRecordCallback.cpp b/test/testRecordCallback.cpp
index 2df3c5f..99daea8 100644
--- a/test/testRecordCallback.cpp
+++ b/test/testRecordCallback.cpp
@@ -9,14 +9,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_record_callback {
 	static const etk::String configurationRiver =
@@ -70,7 +68,7 @@ namespace river_test_record_callback {
 				if (_format != audio::format_int16) {
 					TEST_ERROR("call wrong type ... (need int16_t)");
 				}
-				TEST_SAVE_FILE_MACRO(int16_t, "REC_INPUT.raw", _data, _nbChunk * _map.size());
+				//TEST_SAVE_FILE_MACRO(int16_t, "REC_INPUT.raw", _data, _nbChunk * _map.size());
 				const int16_t* data = static_cast<const int16_t*>(_data);
 				int64_t value = 0;
 				for (size_t iii=0; iii<_nbChunk*_map.size(); ++iii) {
diff --git a/test/testRecordRead.cpp b/test/testRecordRead.cpp
index 8f0c757..4a09152 100644
--- a/test/testRecordRead.cpp
+++ b/test/testRecordRead.cpp
@@ -10,13 +10,11 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
-#include "main.hpp"
 
 namespace river_test_record_read {
 	
diff --git a/test/testVolume.cpp b/test/testVolume.cpp
index 70d52a4..7c5e0c4 100644
--- a/test/testVolume.cpp
+++ b/test/testVolume.cpp
@@ -10,14 +10,12 @@
 #include <audio/river/Interface.hpp>
 #include <etest/etest.hpp>
 #include <etk/etk.hpp>
-#include <etk/os/FSNode.hpp>
 extern "C" {
 	#include <math.h>
 }
 
 #include <ethread/Thread.hpp>
 #include <ethread/tools.hpp>
-#include "main.hpp"
 
 namespace river_test_volume {
 	static const etk::String configurationRiver =