> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tryorato.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice and language

> Choose your assistant's voice provider, model, voice, and speaking speed, and set the languages it understands and speaks.

The **Voice** tab controls how your assistant sounds and which languages it uses.

![Voice tab](https://mintcdn.com/oratoinc/4kqJqYTkP_RSjHT3/images/app/assistant-voice.png?fit=max\&auto=format\&n=4kqJqYTkP_RSjHT3\&q=85\&s=17e7d48f7b862aac7d9c92a5efa5cca1)

## Voice

**1. Pick a provider**

Choose **Cartesia**, **ElevenLabs**, **Sarvam**, or **Smallest AI**. The cost estimate at the top of the page updates when you switch.

**2. Pick a model and voice**

**Model** and **Voice** are optional. If you leave them, Orato uses the provider's default.

**3. Preview**

Click **Preview** to hear the selected voice.

**4. Set the speed**

Drag the **Speed** slider. The preview replays automatically when you release it, and **Talk** uses the same speed.

### Providers compared

| Provider | Example models | Speed range | Good for |
| - | - | - | - |
| **Cartesia** | Sonic 3 | 0.6x to 1.5x | Natural, low-latency English and Indian voices. Default choice. |
| **ElevenLabs** | Turbo v2.5, Flash 2.5 | 0.7x to 1.2x | Highly expressive voices |
| **Sarvam** | Bulbul v3 | 0.5x to 2x | Hindi, Indian English, and Indian regional languages |
| **Smallest AI** | Lightning v3.1 Pro | 0.5x to 2x | The lowest voice cost per minute |

> [!TIP]
>
> Match the voice to your audience. For Indian callers, try a Cartesia or Sarvam voice with an Indian accent. Keep speed between 0.9x and 1.1x for phone calls; very fast speech is hard to follow on a phone line.

## Languages

### Primary language

The language the agent starts the conversation in. Options include:

* English (US)
* English (India)
* Hindi
* Tamil
* Telugu
* Marathi
* Gujarati
* Bengali

The primary language also guides which [transcriber](/assistants/advanced#transcriber) Orato picks for you.

### Auto switch language

Turn on **Auto switch language** to let the agent follow the caller. If the caller switches language mid-call, the agent switches too.

> [!NOTE]
>
> For the best results in a non-English language, also translate your instructions with **Translate prompt** on the [Prompt](/assistants/prompt#translate-prompt) tab and choose a voice that supports that language.

## Next steps

> **[Settings](/assistants/settings)**
>
> Choose the role and AI model.

> **[Multilingual assistants](/multilingual)**
>
> Serve callers in Hindi and regional languages.


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