def test_multi_frequency_weighting(kinds):
freq = np.linspace(2e1, 2e4)
assert np.allclose(librosa.multi_frequency_weighting(freq, kinds),
np.stack([
librosa.A_weighting(freq),
librosa.Z_weighting(freq),
librosa.C_weighting(freq),
]),
0,
atol=1e-3)
def test_C_weighting(min_db):
# Check that 1KHz is around 0dB
c_khz = librosa.C_weighting(1000.0, min_db=min_db)
assert np.allclose(c_khz, 0, atol=1e-3)
c_range = librosa.B_weighting(np.linspace(2e1, 2e4), min_db=min_db)
# Check that the db cap works
if min_db is not None:
assert not np.any(c_range < min_db)