diff --git a/DMX-2.0/Conduite.cs b/DMX-2.0/Conduite.cs
index 88b4fb2..953a8a6 100644
--- a/DMX-2.0/Conduite.cs
+++ b/DMX-2.0/Conduite.cs
@@ -362,8 +362,12 @@ namespace DMX2
 				courante = null;
 			if (tickThread != null) {
 				running = false;
-				tickThread.Join(50);
-				tickThread.Abort();
+				tickThread.Join (50);
+				tickThread.Abort ();
+			}
+			foreach (var seq in sequenceurs) {
+				IDisposable idis = seq as IDisposable;
+				if(idis!=null) idis.Dispose();
 			}
 			foreach(var driver in Drivers)
 				driver.Dispose();
diff --git a/DMX-2.0/SeqSonUI.cs b/DMX-2.0/SeqSonUI.cs
index 95f86f8..323b7ac 100644
--- a/DMX-2.0/SeqSonUI.cs
+++ b/DMX-2.0/SeqSonUI.cs
@@ -33,6 +33,7 @@ namespace DMX2
 		SequenceurSon sequenceur;
 
 		public bool updateflag=true;
+		bool updating=false;
 
 		bool ff=false;
 		bool rw=false;
@@ -122,11 +123,11 @@ namespace DMX2
 		#region implemented abstract members of DMX2.SequenceurUI
 		public override void Update (bool full)
 		{
+			updating=true;
 			if (full||updateflag ) {
-				listFiles.QueueDraw();
-				SelectionneLigne();
 				UpdListFiles();
-
+//				listFiles.QueueDraw();
+				SelectionneLigne();
 			}
 			updateflag=false;
 			sclVolume.Value = sequenceur.Volume;
@@ -138,7 +139,10 @@ namespace DMX2
 			if (rw) sequenceur.PlayTime += TimeSpan.FromSeconds(-1);
 
 			timeLabel.LabelProp = string.Format ("<small>elap.</small>{0:mm\\:ss\\.fff}\n<small>rem. </small>{1:mm\\:ss\\.fff}",cur,dur-cur);
+			titleLabel.LabelProp = sequenceur.State;
+
 			pbCur.Fraction = (dur == TimeSpan.Zero)?0:(cur.TotalMilliseconds/dur.TotalMilliseconds);
+			updating=false;
 		}
 
 		int IndexSelection()
@@ -254,6 +258,7 @@ namespace DMX2
 
 		protected void OnListFilesCursorChanged (object sender, EventArgs e)
 		{
+			if(updating)return;
 			TreeViewColumn col;
 			TreePath path;
 			listFiles.GetCursor (out path, out col);
diff --git a/DMX-2.0/SequenceurSon.cs b/DMX-2.0/SequenceurSon.cs
index 65a5c21..15518fb 100644
--- a/DMX-2.0/SequenceurSon.cs
+++ b/DMX-2.0/SequenceurSon.cs
@@ -26,16 +26,8 @@ using System.Xml;
 namespace DMX2
 {
 
-	// TODO : Sauvegarde et chargement
-
-	public class SequenceurSon : Sequenceur
+	public class SequenceurSon : Sequenceur, IDisposable
 	{
-		~SequenceurSon()
-		{
-			if(element!=null)
-				Stop();
-			element=null;
-		}
 
 		SeqSonUI ui=null;
 
@@ -57,7 +49,11 @@ namespace DMX2
 		int fadeVStart;
 		int fadeVEnd;
 
+		TimeSpan duration = TimeSpan.Zero;
+
 		Gst.Element element = null;
+		Gst.State state,pending;
+		Gst.StateChangeReturn scret;
 
 		public ReadOnlyCollection<string> Files {
 			get {
@@ -107,28 +103,23 @@ namespace DMX2
 			}
 			set{
 				if(element==null) return;
-				if(element.CurrentState != Gst.State.Paused && element.CurrentState != Gst.State.Playing){
-					taskQueue.Enqueue(delegate(){
-						PlayTime = value;
-					});
-					return;
-				}
-				long pos = (long)(value.TotalMilliseconds) * 1000000;
-				element.Seek (Gst.Format.Time,Gst.SeekFlags.Flush|Gst.SeekFlags.Accurate,pos);
+				QueueTask(delegate(){
+					//Console.WriteLine("Seek");
+					long pos = (long)(value.TotalMilliseconds) * 1000000;
+					element.Seek (Gst.Format.Time,Gst.SeekFlags.Flush|Gst.SeekFlags.Accurate,pos);
+				});
 			}
 		}
 
-		TimeSpan duration = TimeSpan.Zero;
-
 		public TimeSpan Duration {
 			get {
 				if(element==null) return TimeSpan.Zero;
-				//if(duration == TimeSpan.Zero) {
-					Gst.Format format = Gst.Format.Time ; 
-					long dur;
-					element.QueryDuration(ref format, out dur);
-					duration = TimeSpan.FromMilliseconds(dur/1000000);
-				//}
+				if(duration == TimeSpan.Zero)
+				{
+					Gst.Format fmt = Gst.Format.Time; long dur;
+					element.QueryDuration(ref fmt,out dur);
+					return TimeSpan.FromMilliseconds(dur/1000000);
+				}
 				return duration;
 			}
 		}
@@ -141,10 +132,10 @@ namespace DMX2
 			}
 		}
 
-
-
 		void LoadFile (int pos)
 		{
+			//Console.WriteLine("LoadFile");
+
 			curfile = files[pos];
 			Stop();
 
@@ -161,20 +152,18 @@ namespace DMX2
 		public void Play ()
 		{
 			if(element == null)return;
-			if(element.CurrentState != Gst.State.Paused && element.CurrentState != Gst.State.Playing){
-				taskQueue.Enqueue(delegate(){
-					Play();
-				});
-				return;
-			}
-
-			element.SetState(Gst.State.Playing);
+			QueueTask(delegate(){
+				//Console.WriteLine("Play");
+				element.SetState(Gst.State.Playing);
+			});
 		}
 
 		public void Pause ()
 		{
 			if(element == null)return;
-			element.SetState(Gst.State.Paused);
+			QueueTask(delegate(){
+				element.SetState(Gst.State.Paused);
+			});
 		}
 
 		public void Stop ()
@@ -221,15 +210,54 @@ namespace DMX2
 			return 0;
 		}
 
+		public string State {
+			get {
+				if(element == null) return "Stopped";
+				UpdateState();
+				if(pending == Gst.State.VoidPending){
+					return state.ToString();
+				}
+				if(scret == Gst.StateChangeReturn.Async)
+					return string.Format("{0}=>{1}", state,pending);
+				return string.Format("{0}=>{1} : {2}",state,pending,scret);
+			}
+		}
+
+		void UpdateState ()
+		{
+			scret = element.GetState (out state, out pending, 0UL);
+		}
+
+		bool CheckAsync ()
+		{
+			if (element == null) return false;
+			UpdateState ();
+			return (scret != Gst.StateChangeReturn.Async);
+		}
+
+		void QueueTask (Task t)
+		{
+			if (CheckAsync ()) {
+				//Console.WriteLine("Sync");
+				t();
+				return;
+			}
+			//Console.WriteLine("Queue");
+			taskQueue.Enqueue(t);
+		}
+
 		public override void Tick (TimeSpan time)
 		{
-			if (element != null && taskQueue.Count>0) {
-				if (element.CurrentState == Gst.State.Paused || element.CurrentState == Gst.State.Playing)
-				{	
-					Task t;
-					if(taskQueue.TryDequeue(out t)) t();
+			if (taskQueue.Count>0 && CheckAsync()){
+				//Console.WriteLine(State);
+				Task task;
+				if(taskQueue.TryDequeue(out task)) 
+				{
+					//Console.WriteLine("ASync");
+					task();
 				}
 			}
+
 			if (fading != TimeSpan.Zero) {
 				fading-=time;
 				if(fading<=TimeSpan.Zero){
@@ -294,6 +322,7 @@ namespace DMX2
 
 		public override void Command (string command)
 		{
+			//Console.WriteLine("Command");
 			lock (this) {
 				var cmd = regexCommand1.Match (command);
 
@@ -330,9 +359,10 @@ namespace DMX2
 							fadeVEnd = (int)vol;
 						}
 						else{
-						Volume = vol;
-						if (ui != null)
-							ui.updateflag = true;
+							fading = TimeSpan.Zero;
+							Volume = vol;
+							if (ui != null)
+								ui.updateflag = true;
 						}
 					}
 
@@ -423,6 +453,16 @@ namespace DMX2
 		}
 		#endregion
 
+		#region IDisposable implementation
+		void IDisposable.Dispose ()
+		{
+			if(element==null)return;
+			element.SetState(Gst.State.Null);
+			element.Dispose();
+			element=null;
+		}
+		#endregion
+
 	}
 }