Voices
Hear the voices on offer, then choose one for your agent and set the languages it answers in.
A voice is three choices: a provider, a model from that provider, and a voice from that model. The voice applies to the whole agent: every step speaks with it.
Providers
| Provider | Good for | Speaks |
|---|---|---|
| Woise | Indian voices at the lowest price | 10 Indian languages and English |
| Sarvam | Natural Indian voices | 10 Indian languages and English |
| Soniox | Many voices at a low price | 60 languages |
| Deepgram | Clear, fast US English | English only |
| Cartesia | The most expressive voices | 44 languages |
Woise has two models, each with its own voices. Woise Natural (the default) has Hindi, English and Kannada voices; Woise Classic has voices in ten Indian languages and US English.
Every voice has a little face that matches whether it sounds like a man or a woman. If we don't know (a voice you cloned yourself, for example), you'll see a plain sound icon instead. Always check that a voice speaks your contacts' language before you pick it.
Sarvam has over 200 voices. Pick a language and the voices that speak it naturally show up first. Sarvam doesn't have voices for Malayalam or Odia yet.
Hearing voices
The Voices page lets you browse every provider's voices and play any of them. Type your own line in Text to hear to judge a voice on the words your agent will actually say.
Each play costs a few credits, and the price of the next play shows beside its button. Replaying the same clip is free.
Choosing a voice for an agent
Open the Voice dialog
In the builder, select the voice button in the header. The Voice dialog opens.
Pick a provider and a voice
Choose the provider, the model where there is more than one, and a voice. Play it with your own text before you decide.
Set the languages
Under Languages, choose what the agent Answers in:
- Same as the contact answers in the language the contact speaks, and follows them if they switch. A language the voice cannot speak gets one it can.
- One language always answers in the language you pick.
- My own rule adds your own instruction to the prompt, word for word.
Then pick a Speaking style: Everyday, Professional, or In my words to describe it yourself. The accent comes from the voice; the style changes the words and the tone.
What contacts speak is set with the transcriber, in the AI models dialog.
Save
Select Save voice. The choice is saved to the agent.
Emotions
Some voices can change how they sound, for example happy or calm. When the chosen voice can, Show emotions on calls appears in the dialog. Turn it on and the agent picks a feeling for each reply from what the contact says. How should it show emotion? (optional) lets you steer it, for example Stay calm and kind. Sound happy only when a booking is confirmed. With Cartesia, emotions work in English sentences only.
When the chosen voice cannot change emotion, the dialog names the providers that can.
Next
Decide what the voice says in Prompts, play a recording for the greeting instead (see Steps), or hear the voice on a real call from the Builder.
Common questions
How do I choose a voice for my agent?
In the builder, select the voice button in the header, pick a provider, a model and a voice, play it with your own text, then select Save voice.
Can I hear a voice before choosing it?
Yes. The Voices page lets you play any provider's voices and type your own line to hear it said.
Which languages can the agent answer in?
You can have it answer in the same language as the contact, always in one language, or follow your own rule. What the contact speaks is set with the transcriber.
Which providers offer Indian voices?
Woise and Sarvam are built for Indian languages. Pick a language and the voices that speak it naturally show up first.
Can a voice show emotion?
Some can. When the chosen voice supports it, a Show emotions on calls option appears in the dialog.