code: def __process_flac_audio(flac_path, wav_path):
      os.makedirs(wav_path, exist_ok=True)
      flac_files = os.listdir(flac_path)
      for flac_file in flac_files:
          # Convert FLAC file to WAV
          id = Path(flac_file).stem
          wav_file = os.path.join(wav_path, id + ".wav")
          if not os.path.exists(wav_file):
              Transformer().build(
                  os.path.join(flac_path, flac_file), wav_file
              )
  
file_path: NeMo/scripts/dataset_processing/speaker_tasks/get_aishell_diarization_data.py
imports: import argparse
  import glob
  import logging
  import os
  import tarfile
  from pathlib import Path
  import wget
  from sox import Transformer
  from nemo.collections.asr.parts.utils.manifest_utils import create_manifest
label_desc: Use image node_id 3 for calling a global function with example usage: __process_flac_audio(flac_path, wav_path) without return types