code: def _make_win(n, mono=False):
      
  
      if mono:
          win = np.hanning(n) + 0.00001
      else:
          win = np.array([np.hanning(n) + 0.00001, np.hanning(n) + 0.00001])
      win = np.transpose(win)
      return win
docs: Generate a window for a given length.
  
      :param n: an integer for the length of the window.
      :param mono: True for a mono window, False for a stereo window.
      :return: an numpy array containing the window value.