code: def spectrogram(title, spectrogram):
      plt.figure(figsize=(8, 4))
      librosa.display.specshow(
          librosa.power_to_db(spectrogram, ref=np.max),
          y_axis="mel",
          fmax=8000,
          x_axis="time",
      )
      plt.colorbar(format="%+10.0f dB")
      plt.title(title)
      plt.tight_layout()
      plt.show()
  
imports: import numpy
label_desc: Use image node_id 3 for calling the AudioVisualizer obj's underlying member method code with example usage: obj.spectrogram(title, spectrogram) without return types