def process_beats_and_chords(youtube_id): print('START PROCESS >> ', str(datetime.now())) from madmom.processors import ParallelProcessor processMulti = ParallelProcessor([], num_threads=2) processMulti.append(get_beat_processor()) processMulti.append(get_chords_processor()) print('BEAT PROCESS >> ', str(datetime.now())) return processMulti.process(OUT_FILE_PATH + youtube_id + '.' + OUT_FILE_EXT)