protected override void updateHeaderControl3(UnityEngine.Rect position)
    {
        AudioTrack track = TargetTrack.Behaviour as AudioTrack;

        if (track == null)
        {
            return;
        }

        Color temp = GUI.color;

        GUI.color = (track.AudioClips.Length > 0) ? Color.green : Color.red;

        int controlID = GUIUtility.GetControlID(track.GetInstanceID(), FocusType.Passive, position);

        if (GUI.Button(position, string.Empty, TrackGroupControl.styles.addIcon))
        {
            EditorGUIUtility.ShowObjectPicker <AudioClip>(null, false, string.Empty, controlID);
        }

        if (Event.current.type == EventType.ExecuteCommand && Event.current.commandName == "ObjectSelectorClosed")
        {
            if (EditorGUIUtility.GetObjectPickerControlID() == controlID)
            {
                Object    pickedObject = EditorGUIUtility.GetObjectPickerObject();
                AudioClip clip         = (pickedObject as AudioClip);
                if (clip != null)
                {
                    CinemaAudio ca = CutsceneItemFactory.CreateCinemaAudio(track, clip, state.ScrubberPosition);
                    Undo.RegisterCreatedObjectUndo(ca, string.Format("Created {0}", ca.name));
                }
                Event.current.Use();
            }
        }
        GUI.color = temp;
    }