diff --git a/river/Manager.cpp b/river/Manager.cpp
index d98d845..05f05fe 100644
--- a/river/Manager.cpp
+++ b/river/Manager.cpp
@@ -16,6 +16,23 @@
 #undef __class__
 #define __class__ "Manager"
 
+static std::string basicAutoConfig = 
+	"{\n"
+	"	microphone:{\n"
+	"		io:'input',\n"
+	"		map-on:'microphone',\n"
+	"		resampling-type:'speexdsp',\n"
+	"		resampling-option:'quality=10'\n"
+	"	},\n"
+	"	speaker:{\n"
+	"		io:'output',\n"
+	"		map-on:'speaker',\n"
+	"		resampling-type:'speexdsp',\n"
+	"		resampling-option:'quality=10'\n"
+	"	}\n"
+	"}\n";
+
+
 std::shared_ptr<river::Manager> river::Manager::create(const std::string& _applicationUniqueId) {
 	return std::shared_ptr<river::Manager>(new river::Manager(_applicationUniqueId));
 }
@@ -25,7 +42,8 @@ river::Manager::Manager(const std::string& _applicationUniqueId) :
   m_listOpenInterface() {
 	// TODO : Maybe create a single interface property (and all get the same ...)
 	if (m_config.load("DATA:virtual.json") == false) {
-		RIVER_ERROR("you must set a basic configuration file for virtual configuration: DATA:virtual.json");
+		RIVER_WARNING("you must set a basic configuration file for virtual configuration: DATA:virtual.json (load default interface)");
+		m_config.parse(basicAutoConfig);
 	}
 }
 
diff --git a/river/io/Manager.cpp b/river/io/Manager.cpp
index ade73f7..1cea7e6 100644
--- a/river/io/Manager.cpp
+++ b/river/io/Manager.cpp
@@ -12,9 +12,44 @@
 #undef __class__
 #define __class__ "io::Manager"
 
+
+static std::string basicAutoConfig =
+	"{\n"
+	"	microphone:{\n"
+	"		io:'input',\n"
+	"		map-on:{\n"
+	"			interface:'auto',\n"
+	"			name:'default',\n"
+	"		},\n"
+	"		frequency:0,\n"
+	"		channel-map:[\n"
+	"			'front-left', 'front-right'\n"
+	"		],\n"
+	"		type:'auto',\n"
+	"		nb-chunk:1024\n"
+	"	},\n"
+	"	speaker:{\n"
+	"		io:'output',\n"
+	"		map-on:{\n"
+	"			interface:'auto',\n"
+	"			name:'default',\n"
+	"		},\n"
+	"		frequency:0,\n"
+	"		channel-map:[\n"
+	"			'front-left', 'front-right',\n"
+	"		],\n"
+	"		type:'auto',\n"
+	"		nb-chunk:1024,\n"
+	"		volume-name:'MASTER'\n"
+	"	}\n"
+	"}\n";
+
+
+
 river::io::Manager::Manager() {
 	if (m_config.load("DATA:hardware.json") == false) {
-		RIVER_ERROR("you must set a basic configuration file for harware configuration: DATA:hardware.json");
+		RIVER_WARNING("you must set a basic configuration file for harware configuration: DATA:hardware.json (load default interface)");
+		m_config.parse(basicAutoConfig);
 	}
 	// TODO : Load virtual.json and check if all is correct ...
 };
diff --git a/river/io/Node.cpp b/river/io/Node.cpp
index 3a42e82..7d657d3 100644
--- a/river/io/Node.cpp
+++ b/river/io/Node.cpp
@@ -150,13 +150,13 @@ river::io::Node::Node(const std::string& _name, const std::shared_ptr<const ejso
 	std::string streamName = "default";
 	const std::shared_ptr<const ejson::Object> tmpObject = m_config->getObject("map-on");
 	if (tmpObject == nullptr) {
-		RIVER_WARNING("missing node : 'map-on' ==> auto map : 'alsa:default'");
+		RIVER_WARNING("missing node : 'map-on' ==> auto map : 'auto:default'");
 	} else {
 		std::string value = tmpObject->getStringValue("interface", "default");
 		typeInterface = airtaudio::getTypeFromString(value);
 		streamName = tmpObject->getStringValue("name", "default");
 	}
-	int32_t frequency = m_config->getNumberValue("frequency", 48000);
+	int32_t frequency = m_config->getNumberValue("frequency", 1);
 	std::string type = m_config->getStringValue("type", "int16");
 	int32_t nbChunk = m_config->getNumberValue("nb-chunk", 1024);
 	std::string volumeName = m_config->getStringValue("volume-name", "");
@@ -222,13 +222,57 @@ river::io::Node::Node(const std::string& _name, const std::shared_ptr<const ejso
 		RIVER_INFO("    isDefaultInput=" << m_info.isDefaultInput);
 		RIVER_INFO("    rates=" << m_info.sampleRates);
 		RIVER_INFO("    native Format: " << m_info.nativeFormats);
+		
 		if (etk::isIn(hardwareFormat.getFormat(), m_info.nativeFormats) == false) {
-			RIVER_CRITICAL("Can not manage input transforamtion: " << hardwareFormat.getFormat() << " not in " << m_info.nativeFormats);
-			// TODO : Manage this
+			if (type == "auto") {
+				if (etk::isIn(audio::format_int16, m_info.nativeFormats) == true) {
+					hardwareFormat.setFormat(audio::format_int16);
+					RIVER_INFO("auto set format: " << hardwareFormat.getFormat());
+				} else if (etk::isIn(audio::format_float, m_info.nativeFormats) == true) {
+					hardwareFormat.setFormat(audio::format_float);
+					RIVER_INFO("auto set format: " << hardwareFormat.getFormat());
+				} else if (etk::isIn(audio::format_int16_on_int32, m_info.nativeFormats) == true) {
+					hardwareFormat.setFormat(audio::format_int16_on_int32);
+					RIVER_INFO("auto set format: " << hardwareFormat.getFormat());
+				} else if (etk::isIn(audio::format_int24, m_info.nativeFormats) == true) {
+					hardwareFormat.setFormat(audio::format_int24);
+					RIVER_INFO("auto set format: " << hardwareFormat.getFormat());
+				} else if (m_info.nativeFormats.size() != 0) {
+					hardwareFormat.setFormat(m_info.nativeFormats[0]);
+					RIVER_INFO("auto set format: " << hardwareFormat.getFormat());
+				} else {
+					RIVER_CRITICAL("auto set format no element in the configuration: " << m_info.nativeFormats);
+				}
+			} else {
+				RIVER_CRITICAL("Can not manage input transforamtion: " << hardwareFormat.getFormat() << " not in " << m_info.nativeFormats);
+			}
 		}
 		if (etk::isIn(hardwareFormat.getFrequency(), m_info.sampleRates) == false) {
-			RIVER_CRITICAL("Can not manage input transforamtion:" << hardwareFormat.getFrequency() << " not in " << m_info.sampleRates);
-			// TODO : Manage this
+			if (etk::isIn(48000, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(48000);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (etk::isIn(44100, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(44100);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (etk::isIn(32000, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(32000);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (etk::isIn(16000, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(16000);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (etk::isIn(8000, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(8000);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (etk::isIn(96000, m_info.sampleRates) == true) {
+				hardwareFormat.setFrequency(96000);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency());
+			} else if (m_info.sampleRates.size() != 0) {
+				hardwareFormat.setFrequency(m_info.sampleRates[0]);
+				RIVER_INFO("auto set frequency: " << hardwareFormat.getFrequency() << "(first element in list) in " << m_info.sampleRates);
+			} else {
+				RIVER_CRITICAL("Can not manage input transforamtion:" << hardwareFormat.getFrequency() << " not in " << m_info.sampleRates);
+			}
+			interfaceFormat.setFrequency(hardwareFormat.getFrequency());
 		}
 	}