Hi Veridico, Welcome to the forum. Microsoft only has a limited selection of tts voices, there are maybe 3 more you can add that are free, but they pretty much sound like more of the same thing. For the better quality you will have to buy them from 3rd party developers - but also be warned they charge an arm and a leg for public performance of their voices, it's been a big topic on the forum actually. If by chance you have access to a mac, they have some good tts voices that come default with the apple os software - but I don't know about adding more voices to mac. For the most part the best voices in TTS cost money, first to purchase, 2nd on royalty, leaving the best (affordable ) option to simply record your own voice and alter it with software. I have been searching the forums on this topic for ages without success until now. The originator asked for specific instructions on how to add further voices but none appear in any of the comments to date.