The main problem is that the algorithms don't yet know what to stress in a sentence. The problem is semantic, and not so much about the sound of the voice itself.
You can synthesize someone's voice perfectly, but if it's stressing words incorrectly or not at all, it's not going to fool anyone.
Then again, that's probably easier to work around by having humans annotate the sentences to be read.
You can synthesize someone's voice perfectly, but if it's stressing words incorrectly or not at all, it's not going to fool anyone.
Then again, that's probably easier to work around by having humans annotate the sentences to be read.