class_docstr: Mel-Spectrogram using Torchaudio Implementation.
docstr: Return output length of feature dimension D.
code: def output_size(self) -> int:
      """Return output length of feature dimension D."""
      return self.n_mels
  
file_path: espnet/espnet2/asr/frontend/melspec_torch.py
imports: from typing import Tuple
  import torch
  import torch.nn
  import torch.nn.functional
  import torchaudio
  from typeguard import check_argument_types
  from espnet2.asr.frontend.abs_frontend import AbsFrontend
label_desc: Use image node_id 3 for calling the MelSpectrogramTorch obj's underlying member method code with example usage: obj.output_size() and returns: self