def METHOD_NAME(self):
    """Regression of the mel-spectrogram for a voice signal"""
    audio = MonoLoader(
        filename=join(testdata.audio_dir, 'recorded/vignesh.wav'),
        sampleRate=self.sr,
    )()
    expected_file = join(
        filedir(),
        "tensorflowinputfsdsinet",
        "vignesh_melspectrogram_fsdsinet.npy"
    )
    expected = numpy.load(expected_file)
    found = self.melspectrogram(audio)
    found = found[:expected.shape[0], :]
    # Check comment on testRegressionDC.
    self.assertAlmostEqualMatrix(found, expected, 1e0)