def test_mel_filtering(self):
for sample_rate in self.commonSampleRates:
not_just_one = 2
windows = [Signal([1 for _ in range(utility.window_size())],
sample_rate)
for _ in range(not_just_one)]
signal = _mel_filtering(windows)
for i in range(len(signal[0])-1):
self.assertLessEqual(signal[0][i]-1, signal[0][i+1])
self.assertEqual(signal[0][i], signal[1][i])
def test_fft(self):
a_lot = 12
signals = [Signal([0j for _ in range(utility.window_size())], 2)
for _ in range(a_lot)]
some_frequencies = [1, 15, 23]
for i in range(len(signals)):
for f in some_frequencies:
signals[i][f] = 2j
for i in range(len(signals)):
signals[i] = Signal(np.fft.ifft(signals[i]), 1)
signals = _fft(signals)
for signal in signals:
for i in range(len(signal)):
if i in some_frequencies:
self.assertAlmostEqual(signal[i], 4)
else:
self.assertAlmostEqual(signal[i], 0)
