Voice settings and playground
Adjust how the voice in use sounds, try it with your own sentence and save the settings for calls.
Where to find it
Voice › AI voices
Open this screen
Steps
- Open Voice › AI voices and go to Voice settings and playground (or open /app/voice-playground).
- Move the Speed, Stability and Similarity sliders. A slider the voice's provider does not take is greyed out.
- Optional: type a short sentence in Try your own sentence (optional).
- Press Listen with these settings.
- Press Save settings. To go back, press Back to the voice's own settings.
Settings on this screen
| Setting | What it does | Default |
|---|---|---|
| Speed | Slower to faster. | 1.00× |
| Stability | More expressive to more consistent. ElevenLabs voices only. | 50% |
| Similarity | Looser to closer to the original voice. ElevenLabs voices only. | 75% |
| Try your own sentence (optional) | Up to 80 characters to hear instead of the built-in sample. Managers only. | Empty (built-in sample) |
| Save settings | Keeps these settings for samples and for live calls that use the chosen voice. | — |
| Back to the voice's own settings | Removes your saved settings. | — |
Tips
- The line under the buttons says whether live calls already hear these settings.
Good to know
- OpenAI and xAI Grok voices take Speed only; Twilio phone voices take none of these settings.
- Each new sample counts toward the workspace's 30 an hour.
Related how-tos
- AI voices Choose the voice your AI receptionist speaks with on calls, tune how it sounds, teach it how to read names, and clone your own voice.
- Voice playground Type a line, pick a voice and hear it the way callers would, before it goes on a call.
- Test a voice before callers hear it Hear a voice the way callers will, before and after you choose it.