How to use the audiomentations.PitchShift function in audiomentations

for i in range(5):
        output_file_path = os.path.join(
            output_dir, "AddGaussianNoise_{:03d}.wav".format(i)
        )
        augmented_samples = augmenter(samples=samples, sample_rate=SAMPLE_RATE)
        wavfile.write(output_file_path, rate=SAMPLE_RATE, data=augmented_samples)

    # TimeStretch
    augmenter = Compose([TimeStretch(min_rate=0.8, max_rate=1.25, p=1.0)])
    for i in range(5):
        output_file_path = os.path.join(output_dir, "TimeStretch_{:03d}.wav".format(i))
        augmented_samples = augmenter(samples=samples, sample_rate=SAMPLE_RATE)
        wavfile.write(output_file_path, rate=SAMPLE_RATE, data=augmented_samples)

    # PitchShift
    augmenter = Compose([PitchShift(min_semitones=-4, max_semitones=4, p=1.0)])
    for i in range(5):
        output_file_path = os.path.join(output_dir, "PitchShift_{:03d}.wav".format(i))
        augmented_samples = augmenter(samples=samples, sample_rate=SAMPLE_RATE)
        wavfile.write(output_file_path, rate=SAMPLE_RATE, data=augmented_samples)

    # Shift
    augmenter = Compose([Shift(min_fraction=-0.5, max_fraction=0.5, p=1.0)])
    for i in range(5):
        output_file_path = os.path.join(output_dir, "Shift_{:03d}.wav".format(i))
        augmented_samples = augmenter(samples=samples, sample_rate=SAMPLE_RATE)
        wavfile.write(output_file_path, rate=SAMPLE_RATE, data=augmented_samples)

    # Normalize
    augmenter = Compose([Normalize(p=1.0)])
    output_file_path = os.path.join(output_dir, "Normalize_{:03d}.wav".format(0))
    augmented_samples = augmenter(samples=samples, sample_rate=SAMPLE_RATE)