var WO = WO || {};
WO.Song = Backbone.Collection.extend({
  model: WO.Track,
  
  settings : {
    tempo: 120,
    title: "untitled song",
    timeSignature: 4,
    length: "16:0:0"
  }

});

@@ -104,9 +104,9 @@
 o: 1
-2
+3
 0,%0A 
@@ -174,16 +174,200 @@
 %2216:0:0%22
+,%0A    activeInstrument: %22%22%0A  %7D,%0A%0A  initialize : function()%7B%0A%0A    this.add( new WO.Track());%0A    this.settings%5B'activeInstrument'%5D = this.at(0);%0A    // WO.setTempo(this.settings.tempo);
 %0A  %7D%0A%0A%7D)

add activeInstrument functionality