code: def test_equalizer(self):
      center_freq = 300
      q = 0.707
      gain = 1
      sample_rate = 8000
  
      data, path = self.get_whitenoise(sample_rate)
      result = F.equalizer_biquad(
          data, sample_rate, center_freq, gain, q
      )
      self.assert_sox_effect(
          result, path, ["equalizer", center_freq, q, gain]
      )
  
imports: import torch
  import torchaudio.functional
  from torchaudio_unittest.common_utils import get_asset_path, get_whitenoise, load_wav, save_wav, skipIfNoExec, skipIfNoSox, sox_utils, TempDirMixin, TorchaudioTestCase
label_desc: Use image node_id 29 for calling the TestFunctionalFiltering obj's underlying member method code with example usage: obj.test_equalizer() without return types