code: def test_compute_deltas(self):
      channel = 13
      n_mfcc = channel * 3
      time = 1021
      win_length = 2 * 7 + 1
      specgram = torch.randn(channel, n_mfcc, time)
      transform = transforms.ComputeDeltas(win_length=win_length)
      computed = transform(specgram)
      self.assertTrue(
          computed.shape == specgram.shape,
          (computed.shape, specgram.shape),
      )
  
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 14 for calling the Tester obj's underlying member method code with example usage: obj.test_compute_deltas() without return types