Your browser uses voices installed on your operating system. To add more voices:
- Windows: Settings → Time & Language → Speech → Manage voices
- macOS: System Settings → Accessibility → Spoken Content → System Voice
- Android: Settings → Accessibility → Text-to-speech output
- iOS: Settings → Accessibility → Spoken Content → Voices
After installing new voices, you may need to restart your browser or refresh this page for them to appear.