Existing work
Rising?
Machine Learning Systems can be made to predict F0, but…
•Opaque results
•Require large amounts of training data
•Internal representation is typically very complex
•Models of similar speakers aren’t internally similar
It’s hard to take the learning out of a machine learning system and make it understandable to a human.   It’s also often hard to port the system from one problem to another, even to a closely related problem.