ref: d65b7de3c559b5f38119ac96838e2716236cd572
dir: /dnn/torch/lpcnet/scripts/modify_dataset_target.py/
import argparse
import numpy as np
parser = argparse.ArgumentParser(description="sets s_t to augmented_s_t")
parser.add_argument('datafile', type=str, help='data.s16 file path')
args = parser.parse_args()
data = np.memmap(args.datafile, dtype='int16', mode='readwrite')
# signal is in data[1::2]
# last augmented signal is in data[0::2]
data[1 : - 1 : 2] = data[2 : : 2]