docstr: Check default settings for LFCC transform.
docstr_tok: ["Check","default","settings","for","LFCC","transform","."]
code: def test_lfcc_defaults(self):
      """Check default settings for LFCC transform."""
      sample_rate = 16000
      audio = common_utils.get_whitenoise(sample_rate=sample_rate)
  
      n_lfcc = 40
      n_filter = 128
      lfcc_transform = torchaudio.transforms.LFCC(
          sample_rate=sample_rate,
          n_filter=n_filter,
          n_lfcc=n_lfcc,
          norm="ortho",
      )
      torch_lfcc = lfcc_transform(audio)  # (1, 40, 81)
      self.assertEqual(torch_lfcc.dim(), 3)
      self.assertEqual(torch_lfcc.shape[1], n_lfcc)
      self.assertEqual(torch_lfcc.shape[2], 81)
  
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 10 for calling the Tester obj's underlying member method code with example usage: obj.test_lfcc_defaults() without return types