[Chris85]

Originally Posted by Ad Eternam

I've seen her twice in live and her vocals were amazing.
I really don't think her voice is always edited and autotuned. I've studied a bit of sound design and when you use too much filters on a voice, it's getting almost robotic (Cher for example... Or worse, Madonna when she tries to sing live). .
And sometimes, you just can't sing right. It happens.

I also think that Ayu re-recorded her vocals for the CDL 2015-2016 and that's why it took so long to come out on DVD. The best example is "Many Classic Moments". They couldn't edit her vocals that well. It would have sound robotic.
But that's a theory. I'm maybe wrong.

I really doubt that she re-recorded that song.It does sound robotic. They just edited it with more care, so it wasn't extremely robotic.
Auto-tune (known for awful pitch-correction artifacts) is not the only pitch-correction software. Melodyne for example treats voice much more gently, voice still sounds pretty natural. If a person was slightly off-key, it can fix your voice the way it's even hard to tell that something was fixed. I used that program and it does wonders.