code: def main():
      cutoff = False
      musan_dir = None
  
      opts, args = getopt.getopt(sys.argv[1:], "cm:")
      for k, v in opts:
          if k == "-c":
              cutoff = True
          elif k == "-m":
              musan_dir = v
  
      # Read audio
      buf = []
      for audio_filepath in args:
          buf.append(librosa.load(audio_filepath, sr=SAMPLERATE)[0])
      audio = np.concatenate(buf)
  
      # Data Augmentation
      if cutoff:
          audio = apply_cutoff(audio)
      if musan_dir:
          audio = apply_musan(audio, musan_dir)
  
      sys.stdout.buffer.write(encode_audio(audio))
  
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 4 for calling a global function with example usage: main() without return types