diff --git a/data/hardwareNao.json b/data/hardwareNao.json
index e37c9e1..76b21de 100644
--- a/data/hardwareNao.json
+++ b/data/hardwareNao.json
@@ -7,13 +7,13 @@
 			#name:"default",
 			timestamp-mode:"trigered",
 		},
-		group:"baseIOSynchrone",
+		#group:"baseIOSynchrone",
 		frequency:48000,
 		channel-map:[
 			"front-left", "front-right",
 		],
 		type:"int16",
-		nb-chunk:1024,
+		nb-chunk:6000,
 		#volume-name:"MASTER",
 		mux-demux-type:"int16-on-int32",
 	},
@@ -21,19 +21,19 @@
 		io:"input",
 		map-on:{
 			interface:"alsa",
-			name:"hw:0,0,0",
-			#name:"AD1989A_inputs",
+			#name:"hw:0,0,0",
+			name:"AD1989A_inputs",
 			#name:"default",
 			timestamp-mode:"trigered",
 		},
-		group:"baseIOSynchrone",
+		#group:"baseIOSynchrone",
 		frequency:48000,
 		channel-map:[
 			"front-left", "front-right"
-			#, "rear-left", "rear-right"
+			, "rear-left", "rear-right"
 		],
 		type:"int16",
-		nb-chunk:1024, #16384,
+		nb-chunk:6000, #16384,
 		mux-demux-type:"int16",
 	},
 	microphone-rear:{
diff --git a/test/testEchoDelay.h b/test/testEchoDelay.h
index 24b888b..36e65dc 100644
--- a/test/testEchoDelay.h
+++ b/test/testEchoDelay.h
@@ -343,6 +343,9 @@ namespace river_test_echo_delay {
 				m_interfaceOut->start();
 				m_interfaceIn->start();
 				//m_interfaceFB->start();
+				while (m_estimateVolumeInput == true) {
+					usleep(10000);
+				}
 				usleep(10000000);
 				//m_interfaceFB->stop();
 				m_interfaceIn->stop();
diff --git a/test/testRecordCallback.h b/test/testRecordCallback.h
index ae8f525..f993bef 100644
--- a/test/testRecordCallback.h
+++ b/test/testRecordCallback.h
@@ -58,7 +58,7 @@ namespace river_test_record_callback {
 			void run() {
 				m_interface->start();
 				// wait 2 second ...
-				usleep(2000000);
+				usleep(20000000);
 				
 				
 				m_interface->stop();