Amazon Polly is a service that turns text into lifelike speech. Today, we are excited to announce the release of Amazon Polly for Windows, an open-source engine that allows users to take advantage of Amazon Polly voices in SAPI-compliant Windows applications.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/09/amazon-polly-voices-available-in-windows-applications/