Text to speech in Storyline lessons

Thank you all for the very interesting answers. I realised that I didn't explain in a very clear manner what I need. I try to fix: I would like to insert a button inside each page of the Storyline lesson to make a text to speech on the fly when the user click on the button. Only if it's impossible, I would consider the solution of exporting the texts, using a tts to produce an mp3 file of each text and importing the audio files in Storyline.

That said, I know that it's almost impossible to realize tts audio files that seems real human voices (I already worked with Loquendo, an Italian company acquired last year by Nounce, and Acapela:  with a very hard work you can reach a very similar result. But it's not worth the hassle: it's less expensive record real voices). Nevertheless I think that it's better than nothing and it could be a useful service for users with problems like dyslexia...

Two other points:

- I'm (unfortunately ) Italian; so I need tts with italian voices

- the learning lessons are for commercial use

Thank you all.

Bye

Maurizio