If I understand right, anything that uses the SAPI5 protocol should be able to work with JAWS, but not any other random TTS. So if the developers of the voice make them SAPI5 compatible, sure. Otherwise, probably not..I doubt Freedom Scientific is going to put any effort into software synthss. I’m kind of surprised Eloquence still works, but evidently a lot of people still like and use it, as they should – it’s pretty reliable and solid.