Re: Neural and Standard Voices

I'd suggest you review this page: https://access.articulate.com/support/article/Storyline-360-SSML-Support 

I would also suggest you review this page: https://community.articulate.com/articles/storyline-360-converting-text-to-speech#neural 

Both give you a good idea of how to work with the two types of text-to-speech voice generation.