code: def encode_audio(audio):
      tmp = io.BytesIO()
      soundfile.write(tmp, audio, SAMPLERATE, format="flac")
      return tmp.getvalue()
  
file_path: espnet/egs2/reazonspeech/asr1/local/augment.py
imports: import getopt
  import glob
  import io
  import os
  import random
  import sys
  import librosa
  import numpy
  import soundfile
label_desc: Use image node_id 1 for calling a global function with example usage: encode_audio(audio) and returns: tmp