code: def animation(self):
      timer = QtCore.QTimer()
      timer.timeout.connect(self.update)
      timer.start(20)
      self.start()
  
file_path: audio-spectrum-analyzer/audio_spectrumQT.py
imports: import numpy
  from pyqtgraph.Qt import QtGui, QtCore
  import pyqtgraph
  import struct
  import pyaudio
  from scipy.fftpack import fft
  import sys
  import time
label_desc: Use image node_id 5 for calling the AudioStream obj's underlying member method code with example usage: obj.animation() without return types