docstr: Check kwargs get correctly passed to the MelSpectrogram transform.
docstr_tok: ["Check","kwargs","get","correctly","passed","to","the","MelSpectrogram","transform","."]
code: def test_mfcc_kwargs_passthrough(self):
      """Check kwargs get correctly passed to the MelSpectrogram transform."""
      sample_rate = 16000
      audio = common_utils.get_whitenoise(sample_rate=sample_rate)
  
      n_mfcc = 40
      melkwargs = {"win_length": 200}
      mfcc_transform = torchaudio.transforms.MFCC(
          sample_rate=sample_rate,
          n_mfcc=n_mfcc,
          norm="ortho",
          melkwargs=melkwargs,
      )
      torch_mfcc = mfcc_transform(audio)  # (1, 40, 161)
      self.assertEqual(torch_mfcc.shape[2], 161)
  
imports: import math
  import torch
  import torchaudio
  import torchaudio.functional
  import torchaudio.transforms
  from torchaudio_unittest import common_utils
label_desc: Use image node_id 8 for calling the Tester obj's underlying member method code with example usage: obj.test_mfcc_kwargs_passthrough() without return types