OS X Speech Synthesis Manager
The Speech Synthesis Manager, sometimes known as Say (after the
say command-line tool), is a built-in interface in Apple’s Mac OS X operating system to allow desktop programs like AwesomeTTS access to voices for text-to-speech playback.
While Mac OS X comes built-in with the ability to use the Speech Synthesis Manager, it usually only ships with one or a small handful of voices. You can make additional voices available in the Speech Synthesis Manager by downloading alternate voices in OS X’s System Preferences. Supported languages include:
Some additional regional dialects of some languages (Chinese, English, French, Portuguese, Spanish) are also available.
Additional voices are also available from third-party vendors.
When using the Speech Synthesis Manager, only the Speed of the voice is available for adjustment.