code: def full_path_to_audio_file(data_folder, slice_file_name, fold_num):
      """Get path to file given slice file name and fold number
      Arguments
      ---------
      slice_file_name : str
          Filename.
      fold_num : int
          Fold number.
      Returns
      ------
      string containing absolute path to corresponding file
      """
      return os.path.join(
          os.path.abspath(data_folder),
          "audio/",
          "fold" + str(fold_num) + "/",
          slice_file_name,
      )
  
file_path: speechbrain/recipes/UrbanSound8k/SoundClassification/urbansound8k_prepare.py
imports: import os
  import json
  import logging
  import ntpath
  import torchaudio
  from speechbrain.dataio.dataio import read_audio
  from speechbrain.dataio.dataio import load_data_csv
label_desc: Use image node_id 5 for calling a global function with example usage: full_path_to_audio_file(data_folder, slice_file_name, fold_num) and returns: os