The system ships with some default voices, including the long-standing novelty ones such as laughing, whispering, bells, and alien voices, but now includes the option to enable high-quality male and female voices that mimic accents from numerous areas of the world. These include numerous European languages, Eastern European, Chinese, Thai, Japanese, other Asian languages, world variations of English (Indian, Australian, U.K., U.S., and more), and Middle Eastern languages like Arabic and Turkish.
The enhanced languages are a bit large at between 300MB and 1GB each. Like other aspects of the OS such as Java, Apple has made them available for download through the OS. To do this, follow these steps:
Apple's new voices are available along with all the older voices
- Go to the Speech system preferences
- Select the "Text to Speech" tab
- Click the "System Voices" menu and choose Customize
- Check the boxes of voices you would like (you can preview them by selecting them and clicking "Play") If the voice is high-quality then there will be a yellow triangle warning next to it, indicating the voice will need to be automatically downloaded.
- Click OK when you have your desired voices
Voices will download through Software Update.
The system will automatically launch Software Update and install the desired voices when you click OK, after which you will be ready to use your new voices. Now just go to an application that supports Apple's Text to Speech (such as TextEdit, Safari, or Mail), select some text, and then right-click it and choose "Start Speaking" from the Speech submenu. This option should also be available in one of the application's menus, such as the Edit menu.