I've been looking at various tools to use for my marketing where I could use voice overs and even clone my voice for audio transcripts. Unmixr is a great app for this. Great selection of voices to pick from and the ability to clone your own voice as well. The technology is still developing, but this is one of the better examples I've seen so far. It gives you options to modify voices for pitch and tone, plus several different languages to choose from as well. I've just started using the product and am on a learning curve, but there are tutorials and the tech team is responsive to questions within 24 hours. Give it a try!