def audio_track_1=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[0] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_1
    tracks = read_attribute :audio_tracks
    return tracks[0] if tracks
  end

  def audio_track_2=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[1] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_2
    tracks = read_attribute :audio_tracks
    return tracks[1] if tracks
  end

  def audio_track_3=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[2] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_3
    tracks = read_attribute :audio_tracks
    return tracks[2] if tracks
  end

  def audio_track_4=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[3] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_4
    tracks = read_attribute :audio_tracks
    return tracks[3] if tracks
  end

  def audio_track_5=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[4] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_5
    tracks = read_attribute :audio_tracks
    return tracks[4] if tracks
  end

  def audio_track_6=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[5] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_6
    tracks = read_attribute :audio_tracks
    return tracks[5] if tracks
  end

  def audio_track_7=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[6] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_7
    tracks = read_attribute :audio_tracks
    return tracks[6] if tracks
  end

  def audio_track_8=a
    tracks = read_attribute :audio_tracks
    tracks ||= []
    tracks[7] = a.empty? ? nil : a.to_i
    write_attribute :audio_tracks, tracks
  end

  def audio_track_8
    tracks = read_attribute :audio_tracks
    return tracks[7] if tracks
  end