code: def add_arguments(
      cls, parser: argparse.ArgumentParser
  ) -> argparse.ArgumentParser:
      group = parser.add_argument_group(cls.__name__)
  
      group.add_argument(
          "--audio-augmentation.mfccs.num-mfccs",
          default=20,
          type=int,
          help="Number of MFCC features.",
      )
      group.add_argument(
          "--audio-augmentation.mfccs.window-length",
          type=float,
          default=0.023,
          help="Window length (unit: seconds) for MFCC calculation.",
      )
      group.add_argument(
          "--audio-augmentation.mfccs.num-frames",
          type=int,
          default=8,
          help="Number of sub-time-slice temporal components. This argument is used"
          " for splitting the temporal dimension of the spectrogram into frames.",
      )
  
      return parser
  
imports: import argparse
  import math
  import pathlib
  import random
  from typing import Callable, Dict, List, Optional, Union
  import torch
  import torchaudio
  from data.transforms import TRANSFORMATIONS_REGISTRY, BaseTransformation
  from data.transforms.audio_aux import mfccs
label_desc: Use image node_id 2 for calling the MFCCs obj's underlying member method code with example usage: obj.add_arguments(cls, parser) and returns: parser