def test_serialize_deserialize_transform_volume(audio):
volume_orig = Volume(factor=0.5)
data_volume = volume_orig.to_dict()
volume = AudioTransform.from_dict(data_volume)
perturbed_volume = volume(audio, SAMPLING_RATE)
assert perturbed_volume.shape == audio.shape
assert_array_almost_equal(perturbed_volume, audio * 0.5)
def test_deserialize_transform_volume(audio):
volume = AudioTransform.from_dict({
"name": "Volume",
"kwargs": {
"factor": 0.5
}
})
perturbed_volume = volume(audio, SAMPLING_RATE)
assert perturbed_volume.shape == audio.shape
assert_array_almost_equal(perturbed_volume, audio * 0.5)
def test_volume_does_not_change_num_samples(audio):
augment_fn = SoxEffectTransform(effects=volume(SAMPLING_RATE))
for _ in range(10):
augmented_audio = augment_fn(audio, sampling_rate=SAMPLING_RATE)
assert augmented_audio.shape == audio.shape
assert augmented_audio != audio
def test_volume(audio_volume, scale):
volume = Volume(factor=scale)
audio_perturbed = volume(audio_volume, SAMPLING_RATE)
assert audio_perturbed.shape == audio_volume.shape
assert_array_almost_equal(audio_perturbed, scale * audio_volume)