diff -r 0a2b4991d48c -r 0bb70072a56f client/annotviz/app/js/doubleroll.js
--- a/client/annotviz/app/js/doubleroll.js	Fri Jan 23 01:08:34 2015 +0100
+++ b/client/annotviz/app/js/doubleroll.js	Fri Jan 23 02:00:19 2015 +0100
@@ -5,14 +5,12 @@
 * Take a look at http://browserify.org/ for more info
 */
 
-/* global document: false */
-
 'use strict';
 
 
 var PIXI = require('pixi');
 var _ = require('lodash');
-var PianoRoll = require('./pianoroll.js');
+var PianoRoll = require('./pianoroll');
 
 var defaultConfig = {
     orientation: 'horizontal',
@@ -63,7 +61,6 @@
     this.noteColors = opts.noteColors;
 
     var noteHeight = opts.noteHeight;
-    var sceneBgColor = opts.sceneBgColor;
     var sceneHeight = opts.sceneHeight || _(opts.pianorolls).reduce(function(s,p) { return s + p.height; }, 0);
     var timeWidth = opts.timeWidth;
     var lineInterval = opts.lineInterval;
@@ -81,7 +78,7 @@
     this.container = new PIXI.DisplayObjectContainer();
     this.container.x = Math.floor(sceneWidth*zeroShift);
     this.container.y = 0;
-    
+
     stageView.registerComponent(this);
 
     var pianorollList = [];
@@ -166,7 +163,7 @@
     };
 
     this.stop = function() {
-    	
+
         pianorollList.forEach(function(c) {
             c.stop();
         });