def test_speed_does_not_change_num_samples(audio):
augment_fn = SoxEffectTransform(effects=speed(SAMPLING_RATE))
# Since speed() is not deterministic and between 0.9x - 1.1x, multiple invocations
# will yield either slower (more samples) or faster (less samples) signal.
# The truncation/padding is performed inside of SoxEffectTransform so the user should not
# see these changes.
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_example_augmentation(audio, effect):
augment_fn = SoxEffectTransform(effects=effect(SAMPLING_RATE))
augmented_audio = augment_fn(audio, sampling_rate=SAMPLING_RATE)
assert augmented_audio.shape == audio.shape
assert augmented_audio != audio
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