I have to set up a simple IVR system on my Asterisk(part of our larger product) and I won’t need any complext Text-to-Speech engines provided by Festival or the commercial Cepstral.
My question is whether it is a good idea in my case to just buy a Text-to-Speech software(e.g. Cepstral), record the required voice messages, and then put them on the Asterisk. Then , will I be able to sell the product without any copyright infringement?
If so, what is the TTS software with the best voice quality you would recommend?