I'm confused. First of all what are we talking about: pitch correction or note duration changes - such as speed up?
Oh, I think now I get it.
Well, theoretically those two (pitch and note duration) go hand in hand. But software can make you compensate for the one or the other.
If I pitch a vocal up, the frequencies are higher, they 'play' faster. That means, however, that the vocal is shortened. So the software kicks in and compensates for the time. So you got higher frequencies but interpolated fill-ins to compensate for the loss of time. These fill ins, you can imagine, are in between every modulation of an vibrato - so the vibrato, even though higher, stays at the same speed.
So melodyne (usually) = higher pitch, but same speed as original.
Teddy however says, the vibrato is faster because of Melodyne. Which means, the software does not compensate for the shortening and therefore the vibratos are faster - as fast, as we can hear them on the Cascio records. That means, according to Teddy's quote, in order to get faster vibratos, the vocals must have been
a) sped up, or
b) pitched up without compensation of time and therefore also sped up.
Of course you can also, like my Earth Song example, speed up a song without pitch being touched. This, sort of, cuts out small pieces of the vocal, so that the pitch stays the same, but the speed is faster.
Sorry if you already knew all that and I misunderstood the problem. Not trying to be a smartass here. But maybe it still helps someone to understand.
To summarize: Most of use might agree, the vibratos on the Cascio tracks are
faster than usual. What did cause this?
a) the vocals were sped up (either by pitching up without compensation for time, or speeding up with compensation for pitch, or a mixture of both). However, when we slow the vocals down (pitch stays the same) to reach usual MJ vibrato speed, the songs (especially the ballads like KYHU, FIL, R2W, W ...) are
way too slow. Nobody would have ever sang those songs that slow. Or we pitch the vocals down (speed stays the same), the songs are way
too low. Also a mixture of both does not get us to a reasonably singable tune with normal MJ vibrato speeds.
b) the vibratos are caused by a different singer
And since the vibratos are all over the songs, and all over 12 songs ... well, you get it. The Cascio songs are not Michael Jackson. If you want, it's all down to the vibrato issue. No matter of 'I can hear him' or not.