Posted On: Nov 9, 2017

Control the tonal quality of Amazon Polly’s voice output with the new vocal-tract-length Speech Synthesis Markup Language (SSML) tag. Adjusting the “vocal tract length” will modify the tone quality, called timbre, to make a voice sound characteristically different without adjusting rate and pitch. This tag can be used with any of the voices in the Amazon Polly Text-to-Speech portfolio to produce many variations for a single voice. 

You now have more options to customize the Amazon Polly voices – editing and adjusting timbre, rate and pitch to create new personas to fit your needs. Try the new timbre modification control effect through the Amazon Polly console, or visit the Amazon Polly documentation for more information around SSML tags.