There are some sounds that it seems speakers can't still faithfully reproduce.<p>Gunshots are one - the sound difference between a real gunshot and a high end sound system replaying a gunshot is huge.<p>Likewise, the sound of an old nokia ringtone (make by a piezoelectric speaker) can't be replicated by a modern speaker really. If you have thee two side by side, you can always tell which is which.<p>I wonder if a modern Fotoplayer could make use of that to make a market for itself?