Konversi Fail Stereo ke Mono Dari Direktori Berisi Banyak Fail Suara

Skrip berikut dapat merubah fail suara stereo ke mono dari suatu direktori (termasuk subdirektori di dalamnya) yang diberikan.
Input: Direktori/folder
Output: Fail berakhiran "_mono" dengan direktori yang sama terhadap input (termasuk subdirektori)

#!/usr/bin/env python3
import os
import argparse
import glob
from pydub import AudioSegment

def stereo2mono(files):
    """Convert all files from stereo to mono.
    Note: this would effectively also create a copy of files that were already in a mono format
    Parameters
    ----------
    files : iterable
        Sequence of files
    Example use:
    ```
    $ python3 stereo2mono.py -f /path/to/audio/files/
    ```
    Then you may remove the files that do not contain the '_mono' tag with: 
    $ find . -name "*-??.wav" -delete # for emovo
    """
    for f in files:
        print(f"Converting {f}")
        # Load audio
        sound = AudioSegment.from_wav(f)
        # Convert to mono
        sound = sound.set_channels(1)
        # Save file
        stem, ext = os.path.splitext(f)
        sound.export(f'{stem}_mono{ext}', format='wav')


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Convert stereo to mono')
    parser.add_argument('-f', '--folder', 
        type=str, help='Path to wavfiles')
    args = parser.parse_args()
    files = glob.glob(args.folder + '**/*.wav', recursive=True)
    stereo2mono(files)

Contoh penggunaan

# Konversi ke mono
python3 stereo2mono.py -f tensorflow_datasets/downloads/extracted/ZIP.emovo.zip/EMOVO/
# menghapus file yang bukan mono
$ pwd
/home/bagus/tensorflow_datasets/downloads/extracted/ZIP.emovo.zip/EMOVO/
$ find . -name "*-??.wav" -delete

Referensi gist:
1. https://gist.github.com/bagustris/40b406d99820207bc804a020db169f7e