def music_visualize_1d(self):
    fig = plt.figure(facecolor='black')
    ax = fig.gca()
    norm = plt.Normalize(-1., 1.)
    lc = LineCollection([], cmap='cool', norm=norm)
    ax.set_ylim(-1.5, 1.5)
    ax.set_axis_off()
    time = np.linspace(0, 2 * np.pi, self.window)
    ax.add_collection(lc)
    plt.pause(self.record_delay)