All this time we've been told the animations aren't based on the game charts!
Though... would I be correct in remembering we've only been told that about the drum charts?
Not that it matters to me so much, but you're going to make some itchy fingers in the conspiracy theorists.
It's all right. Everything will work out fine.
It's all right. We're going to the end of the line!
On keys and drums, all animations are defined independently of the playable authoring.
Vocals are their own weird thing.