class_docstr: Encoder class for saving and loading waveforms.
class_docstr_tok: ["Encoder","class","for","saving","and","loading","waveforms","."]
code: def num_reserved_ids(self):
      return 0
  
file_path: tensor2tensor/tensor2tensor/data_generators/audio_encoder.py
imports: import os
  from subprocess import call
  import tempfile
  import numpy
  from scipy.io import wavfile
label_desc: Use image node_id 2 for calling the AudioEncoder obj's underlying member method code with example usage: obj.num_reserved_ids() and returns: int