diff -r 7dfdafb88968 -r fa9e24e46968 client/annotviz/app/js/pianoroll.js
--- a/client/annotviz/app/js/pianoroll.js	Fri Apr 17 15:20:46 2015 +0200
+++ b/client/annotviz/app/js/pianoroll.js	Fri Apr 17 15:32:19 2015 +0200
@@ -43,7 +43,7 @@
     this.dynamicRange = options.dynamicRange;
     this.initRange = options.range;
     this.range = options.range;
-    
+
 
     var started = false;
 
@@ -84,7 +84,8 @@
     this.addNoteRaw = function(data) {
         var note = data.content[3];
         var velocity = data.content[4];
-        var ts = (data.content[0] - NTP_EPOCH_DELTA)*1000;
+        //var ts = (data.content[0] - NTP_EPOCH_DELTA)*1000;
+        var ts = Date.parse(data.ts_server);
         var channel = data.content[2];
         var sessionTs = data.content[1];
 
@@ -143,7 +144,7 @@
             	}
             	var y = Math.floor(((this.range.top-this.range.bottom)-(note-this.range.bottom)+0.5) * (this.noteHeight) - (this.noteHeight/2));
                 var color = this.getColor(channel);
-                
+
                 var alpha = (noteVelocity / 128);
 
                 graphics = this.getNoteRect(note, x, y, color, alpha, width, this.noteHeight);
@@ -158,7 +159,7 @@
             }
         }
     };
-    
+
     //rescale scene in case a note out of range is added or a note out of the range is removed
     this.rescaleScene = function(newScale){
     	var _this = this;
@@ -175,8 +176,8 @@
     	if (newScale){
     		this.range = newScale;
     	}else{
-    		this.range.top = top; 
-    		this.range.bottom = bottom; 
+    		this.range.top = top;
+    		this.range.bottom = bottom;
     	}
     	this.noteHeight = this.height / (this.range.top - this.range.bottom + 1);
     	childrenToUpdate.forEach(function(child) {