class_docstr: Encoder class for saving and loading waveforms.
class_docstr_tok: ["Encoder","class","for","saving","and","loading","waveforms","."]
code: def vocab_size(self):
      return 256
  
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 6 for calling the AudioEncoder obj's underlying member method code with example usage: obj.vocab_size() and returns: int