class_docstr: Test functions defined in `functional` module
class_docstr_tok: ["Test","functions","defined","in","`","functional","`","module"]
code: def test_deemphasis(self):
      waveform = torch.rand(
          3, 2, 100, device=self.device, dtype=self.dtype
      )
      coeff = 0.9
      actual = F.deemphasis(waveform, coeff=coeff)
  
      expected = []
      for i in range(waveform.size(0)):
          expected.append(F.deemphasis(waveform[i], coeff=coeff))
  
      self.assertEqual(torch.stack(expected), actual)
  
imports: import itertools
  import math
  from functools import partial
  import torch
  import torchaudio.functional
  from parameterized import parameterized, parameterized_class
  from torchaudio_unittest import common_utils
label_desc: Use image node_id 30 for calling the TestFunctional obj's underlying member method code with example usage: obj.test_deemphasis() without return types