Cut gamelan sound by their onsets

cut_gamelan_by_onset.py

from pydub import AudioSegment
import uuid
import librosa
import numpy as np
import os

BASE_FOLDER = './dir/'
FILE = 'Saron_mono_1.wav'

file_path = os.path.join(BASE_FOLDER, FILE)

sound = AudioSegment.from_wav(file_path)

signal, sr = librosa.load(file_path)
ONSET = librosa.onset.onset_detect(y=signal, sr=sr, units='time')
ONSET_LIST = ONSET.tolist()

for i in range(len(ONSET_LIST)):
    start = 0

    if i > 0:
        start = int(ONSET_LIST[i-1] * 1000) - 20

    end = int(ONSET_LIST[i] * 1000) - 30

    sound_cut = sound[start:end]
    new_file_name = FILE.split('_')[0] + '_' + FILE.split('_')[2]
    sound_cut.export(new_file_name + '_' + str(i) + '_' + uuid.uuid4().hex + '.wav', format='wav')