For listening on a phone, a portable player or an mp3 player. We advise you to choose the standard quality at 128/kbps, which is ideal for a pleasant listening experience and a reasonable MP3 file size. However, you can also choose the low quality at 64/kbps. Sure, you'll probably hear a loss of quality compared to standard, but the advantage is that the audio file takes up much less space on your device. Finally, we don't recommend going above standard quality, as audio devices on phones, portable players and mp3 players won't allow you to hear the difference between standard, high quality and very high quality.