Amazon Polly is a service that turns text into lifelike speech. Today, we are excited to announce the general availability of all Neural Text-to-Speech (NTTS) voices in the Asia Pacific (Sydney) region. NTTS voices, which deliver ground-breaking improvements in speech quality through a new machine learning approach, are also available in US East (N. Virginia), US West (Oregon) and Europe (Ireland). Customers in these four regions can now synthesize 13 NTTS voices (8 US English, 3 UK English, 1 US Spanish and 1 Brazilian Portuguese) in the Polly portfolio. In addition, 2 speaking style voices – Newscaster and Conversational, built using NTTS technology are also available in US English (Matthew and Joanna) starting today.

from Recent Announcements: https://aws.amazon.com/about-aws/whats-new/2019/12/amazon-launches-neural-text-to-speech-voices-in-syd-region/