change_playback_speed.py

from pydub import AudioSegement

def load_audio(audio_path, ext):
    return AudioSegement.from_file(audio_path, format=ext)

def speed_change(audio, speed):
    audio_with_altered_frame_rate = audio._spawn(
        audio.raw_data, overrides={
         "frame_rate": int(audio.frame_rate * speed)
      })
    return audio_with_altered_frame_rate.set_frame_rate(audio.frame_rate)

def save_audio(audio, save_path, ext='wav'):
    return audio.export(save_path, format=ext)

def main(audio_path, ext, speed):
    audio = load_audio(audio_path, ext)
    new_audio = speed_change(audio, speed)
    save_audio(audio, './out.wav', ext)

if __name__ == '__main__':
    ext = 'wav'
    audio_path = '/audio_file.wav'
    speed=1.5
    main(audio_path, ext, speed)