diff -r 79ae42ad97d4 -r e0e514c5470f client/annotviz/app/js/pianoroll.js
--- a/client/annotviz/app/js/pianoroll.js	Fri Jan 16 03:16:19 2015 +0100
+++ b/client/annotviz/app/js/pianoroll.js	Fri Jan 16 20:20:28 2015 +0100
@@ -17,8 +17,8 @@
 function PianoRoll(options) {
     var _this = this;
     this.container = new PIXI.DisplayObjectContainer();
-    this.container.position.x = options.xInit;
-    this.container.position.y = options.yInit;
+    this.container.x = options.xInit;
+    this.container.y = options.yInit;
     options.parentContainer.addChild(this.container);
 
     this.linesDown = options.linesDown;
@@ -34,6 +34,8 @@
     this.noteDict = {};
     this.startTs = options.startTs || Date.now();
 
+    var started = false;
+
 
     //TODO: I do not like the "regColor" object. This should not be global, but local
     this.getColor = function(canal) {
@@ -192,8 +194,7 @@
     };
 
     this.start = function() {
-        if(typeof(this.startTs) === 'undefined') {
-            console.log('Container Started');
+        if(!started) {
             this.startTs = Date.now();
             this.addLine();
         }