def augment_audio(data, sampling_rate, loudness_factor, speed_range, pitch_range, shift_max, noise_factor):
"""
OPTIONS:
LOUDNESS AUGMENTER: naa.LoudnessAug()
MASK AUGMENTER: naa.MaskAug()
SPEED AUGMENTER: naa.SpeedAug()
SHIFT AUGMENTER: naa.ShiftAug()
NOISE AUGMENTER: naa.NoiseAug()
CROP AUGMENTER: naa.CropAug()
PITCH AUGMENTER_ naa.PitchAug()
"""
flow = naf.Sequential([naa.LoudnessAug(loudness_factor),
naa.SpeedAug(speed_range),
naa.PitchAug(sampling_rate = sampling_rate, pitch_range = pitch_range),
naa.ShiftAug(sampling_rate = sampling_rate, shift_max = shift_max),
naa.NoiseAug(noise_factor),
])
augmented_audio = flow.augment(data)
return augmented_audio
def test_substitute(self):
audio, sampling_rate = AudioLoader.load_audio(self.sample_wav_file)
aug = naa.ShiftAug(sampling_rate, duration=0.5)
augmented_audio = aug.augment(audio)
self.assertFalse(np.array_equal(audio, augmented_audio))
self.assertTrue(len(audio), len(augmented_audio))
def testSubsitute(self):
audio, sampling_rate = librosa.load(self.sample_wav_file)
aug = naa.ShiftAug(sampling_rate, shift_max=0.5)
augmented_audio = aug.augment(audio)
self.assertFalse(np.array_equal(audio, augmented_audio))
self.assertTrue(len(audio), len(augmented_audio))
def test_audio(self):
audio, sampling_rate = AudioLoader.load_audio(self.sample_wav_file)
flow = naf.Sequential([
naa.NoiseAug(),
naa.PitchAug(sampling_rate=sampling_rate, factor=(0.2, 1.5)),
naa.ShiftAug(sampling_rate=sampling_rate, duration=2),
naa.SpeedAug(factor=(1.5, 3))
])
augmented_audio = flow.augment(audio)
self.assertFalse(np.array_equal(audio, augmented_audio))
self.assertTrue(len(audio), len(augmented_audio))
def test_audio(self):
# https://freewavesamples.com/yamaha-v50-rock-beat-120-bpm
sample_wav_file = os.path.abspath(os.path.join(
os.path.dirname(__file__), '..', '..', 'data', 'Yamaha-V50-Rock-Beat-120bpm.wav'))
audio, sampling_rate = librosa.load(sample_wav_file)
flow = naf.Sequential([
naa.NoiseAug(),
naa.PitchAug(sampling_rate=sampling_rate, factor=(0.2, 1.5)),
naa.ShiftAug(sampling_rate=sampling_rate, duration=2),
naa.SpeedAug(factor=(1.5, 3))
])
augmented_audio = flow.augment(audio)
self.assertFalse(np.array_equal(audio, augmented_audio))
self.assertTrue(len(audio), len(augmented_audio))
def test_audio(self):
# https://freewavesamples.com/yamaha-v50-rock-beat-120-bpm
sample_wav_file = os.path.join(os.environ.get("TEST_DIR"), 'res',
'audio',
'Yamaha-V50-Rock-Beat-120bpm.wav')
audio, sampling_rate = AudioLoader.load_audio(sample_wav_file)
flow = naf.Sequential([
naa.NoiseAug(),
naa.PitchAug(sampling_rate=sampling_rate, factor=(0.2, 1.5)),
naa.ShiftAug(sampling_rate=sampling_rate, duration=2),
naa.SpeedAug(factor=(1.5, 3))
])
augmented_audio = flow.augment(audio)
self.assertFalse(np.array_equal(audio, augmented_audio))
self.assertTrue(len(audio), len(augmented_audio))
def aug_timeshift(data, sampling_rate): aug = naa.ShiftAug(sampling_rate=sr) augmented_data = aug.augment(data) return augmented_data
try:
os.makedirs(path)
except OSError:
print("Creation of the directory %s failed" % path)
else:
print("Creation of the directory %s success" % path)
if os.path.exists(csv_file_path):
input_directory = Path(csv_file_path)
for my_filename in input_directory.glob("*_AUDIO_*.wav"):
audio, sampling_rate = librosa.load(my_filename)
VisualWave.visual('Original', audio, sampling_rate)
flow = naf.Sequential([
naa.NoiseAug(),
naa.PitchAug(sampling_rate=sampling_rate,
pitch_factor=1.5),
naa.ShiftAug(sampling_rate=sampling_rate, shift_max=2),
naa.SpeedAug(speed_factor=1.5)
])
augmented_audio = flow.augment(audio)
VisualWave.visual('augment', augmented_audio,
sampling_rate)
my_filename = my_filename.stem
librosa.output.write_wav(path + my_filename + '.wav',
augmented_audio,
sampling_rate,
norm=False)
except ValueError:
print("Skipping the following line: ", row[0])
csvFile.close()
"""
Pitch Augmenter
This augmentation is a wrapper of librosa function. It change pitch randomly
"""
aug = naa.PitchAug(sampling_rate=sampling_rate, pitch_factor=0.5)
augmented_audio = aug.substitute(audio)
VisualWave.visual('Pitch', augmented_audio, sampling_rate)
"""
Shift Augmenter
The idea of shifting time is very simple.
It just shift audio to left/right with a random second.
If shifting audio to left (fast forward) with x seconds, first x seconds will mark as 0 (i.e. silence).
If shifting audio to right (back forward) with x seconds, last x seconds will mark as 0 (i.e. silence).
"""
aug = naa.ShiftAug(sampling_rate=sampling_rate, shift_max=0.2)
augmented_audio = aug.substitute(audio)
VisualWave.visual('Shift', augmented_audio, sampling_rate)
"""
Speed Augmenter
Same as changing pitch, this augmentation is performed by librosa function. It stretches times series by a fixed rate.
"""
aug = naa.SpeedAug(speed_factor=1.5)
augmented_audio = aug.substitute(audio)
VisualWave.visual('Speed', augmented_audio, sampling_rate)
# Frequency Masking and Time Masking
flow = naf.Sequential([
def add_shift(data, sr):
aug = naa.ShiftAug(sampling_rate=sr)
return aug.augment(data)