def test_allpass(self):
"""
Test biquad allpass filter, compare to SoX implementation
"""
CENTRAL_FREQ = 1000
Q = 0.707
noise_filepath = os.path.join(self.test_dirpath, "assets",
"whitenoise.wav")
E = torchaudio.sox_effects.SoxEffectsChain()
E.set_input_file(noise_filepath)
E.append_effect_to_chain("allpass", [CENTRAL_FREQ, str(Q) + 'q'])
sox_output_waveform, sr = E.sox_build_flow_effects()
waveform, sample_rate = torchaudio.load(noise_filepath,
normalization=True)
output_waveform = F.allpass_biquad(waveform, sample_rate, CENTRAL_FREQ,
Q)
torch.testing.assert_allclose(output_waveform,
sox_output_waveform,
atol=1e-4,
rtol=1e-5)
def func(tensor):
sample_rate = 44100
central_freq = 1000.
q = 0.707
return F.allpass_biquad(tensor, sample_rate, central_freq, q)
