code: def _max(self, data):
      return data / np.amax(np.abs(data))
  
file_path: nlpaug/nlpaug/model/audio/normalization.py
imports: import numpy
  from nlpaug.model.audio import Audio
label_desc: Use image node_id 4 for calling the Normalization obj's underlying member method code with example usage: obj._max(data) and returns: unknown