Have you wondered why all singers has their new single album sung nicely, yet when they stand on stage, sometimes it's just like scratching a mask off their face, might not be a really pleasant experience for both singers and the audience.

But why? Why is there differences between recorded song and its live version? Well, since the year 1997, when the time "auto-tune" techniques are invented, every single pitch that doesn't match on its right place, can be adjust anyway.

Nowadays even common sounds can be auto-tuned into a song. Some people might even think of giving a package of sound pieces, and others can remix those sound pieces into a beautiful song, and it's the actual idea of the origin of Hatsune Miku.

However, the pitch that has been auto-tuned well never sound as real as the original vocal. Therefore, if you really cares about how the singer sings, you should never choose a song that has been auto-tuned.