diff -r 129281e4bc2a -r 029cdbeebf03 annot-server/static/js/pianoroll.js
--- a/annot-server/static/js/pianoroll.js	Tue Oct 28 11:33:52 2014 +0100
+++ b/annot-server/static/js/pianoroll.js	Tue Oct 28 09:47:11 2014 +0100
@@ -13,10 +13,10 @@
 var nbLines = -1;
 var noteHeight = 110;
 var noteColor = [0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991,
-                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991, 
-                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991, 
-                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991, 
-                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991, 
+                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991,
+                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991,
+                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991,
+                 0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991,
                  0xB90000, 0x4BDD71, 0xAF931E, 0x1C28BA, 0x536991];
 // Vars
 var noteDict = [];
@@ -46,12 +46,12 @@
     this.container.position.x = xInit;
     this.container.position.y = yInit;
     parentContainer.addChild(this.container);
-    
+
     this.linesDown = linesDown;
     this.height = height;
     this.pixelsPerSecond = pixelsPerSecond;
     this.width = width;
-    
+
     this.addNote = function(note, startTime, duration, velocity, canal){
         //console.log("coucou 1", note, timeFromZero, ts, velocity, pixelsPerSecond, container, prHeight);
         var beginX = (offsetMusic + startTime) * this.pixelsPerSecond / 1000;
@@ -66,7 +66,7 @@
         graphics.x = beginX;
         this.container.addChild(graphics);
     };
-    
+
     this.addLine = function(lineNb){
         var graphics = new PIXI.Graphics();
         var x = -this.container.x;
@@ -89,11 +89,11 @@
         t.y = this.linesDown ? this.height - 15 : 2;
         this.container.addChild(t);
     };
-    
+
     this.moveTo = function(diffTime){
         this.container.x = Math.floor(diffTime*this.pixelsPerSecond);
     };
-    
+
     this.removePassedObjets = function(){
         var nbChilds = _this.container.children.length;
         var i = 0, childIsNowDisplayed = false;
@@ -111,7 +111,7 @@
             i++;
         }
     };
-    
+
 }
 
 // Init containers
@@ -201,6 +201,8 @@
     } else {
        wsuri = "ws://" + window.location.hostname + ":8090/broadcast";
     }
+    wsuri = wsuri + "?channel=PIANOROLL&event_code="+event_code;
+
     if ("WebSocket" in window) {
        sock = new WebSocket(wsuri);
     } else if ("MozWebSocket" in window) {