reformatting audio files in certain directory as wav file having certain sample rate

wav_reformat.py

import librosa
import os
from scipy.io import wavfile

ROOT = '.'
DIR = 'src'  # source directory 
TO_DIR = 'dst'  # destination directory
SAMPLE_RATE = 16000

for i, fname in enumerate(os.listdir(os.path.join(ROOT, DIR))):
    base, ext = os.path.splitext(fname)

    fpath = os.path.join(ROOT, DIR, fname)
    audio_data, _ = librosa.load(fpath, sr=SAMPLE_RATE)  # resample while loading
    
    # naming format: {dst_dir}_{index}.wav
    dst_name = f'{TO_DIR}_{i}.wav'
    dst_path = os.path.join(ROOT, TO_DIR, dst_name)
    
    wavfile.write(dst_path, rate=SAMPLE_RATE, data=audio_data)