This is such bad news... my condolences to his son Akio ( who plays Ansem in the japanese dub of KH ) and the rest of his family.
He will be missed.
PS : Please someone tell me there's a slightly chance that what Bill Farmer said was true... I hope he did record lines for KHIII. ( I mean, they did record voices for the Opening of KHIII )
...
Anyways, sad to hear this news. RIP