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

# Voice selection

> How to select a built-in voice or clone your own for your AI assistant.

Your AI assistant can speak with a built-in voice from the library or a custom cloned voice. Natural, realistic voices increase customer trust and engagement.

## TTS provider

Select your Text-to-Speech provider in the assistant settings. This option is available in **Pipeline** and **Dualplex** modes.

**Available providers:**

* **ElevenLabs** — high-quality voices with a wide selection of languages and accents.
* **Cartesia** — fast, low-latency synthesis, useful when response speed is a priority.

The TTS provider dropdown appears after you select a language for your assistant.

## Choosing a voice

Each TTS provider has its own voice library. You can filter by gender, accent, or language depending on your provider. Browse the options in your assistant's voice settings and preview voices before committing.

## Cloning a voice

Voice cloning creates a custom voice from an audio sample — ideal for brand consistency, matching a company spokesperson, or building a personal connection with callers. Cloning is available in **Pipeline** and **Dualplex** modes.

**Requirements by provider:**

| Provider       | Requirements                                                                                                                 |
| -------------- | ---------------------------------------------------------------------------------------------------------------------------- |
| **Cartesia**   | Single audio file, at least 10 seconds, one speaker, no background noise                                                     |
| **ElevenLabs** | Audio samples totalling over 1 minute (max 5 minutes), one speaker, no background noise. Quality matters more than quantity. |

**Steps to clone a voice:**

<Steps>
  <Step title="Start the cloning process">
    In your assistant's voice settings, click **Clone voice** next to the voice selector.
  </Step>

  <Step title="Choose a provider">
    Select **Cartesia** or **ElevenLabs** based on your needs.
  </Step>

  <Step title="Set the language">
    Choose the language the cloned voice will speak.
  </Step>

  <Step title="Name your voice">
    Enter a name you'll recognise in the dropdown later.
  </Step>

  <Step title="Upload audio">
    Record a new sample or upload an existing file that meets the provider's requirements.
  </Step>

  <Step title="Wait for processing">
    Processing typically takes a few minutes. You'll see the voice appear in the dropdown when it's ready.
  </Step>

  <Step title="Select your new voice">
    Pick the cloned voice from the voice selector dropdown and save your assistant.
  </Step>
</Steps>

## Best practices

1. **Use high-quality audio** — clearer samples produce better clones.
2. **Record with steady delivery** — natural tone, no abrupt pauses or changes in volume.
3. **Eliminate background noise** — record in a quiet room or use a quality microphone.
4. **Get proper consent** — only clone voices you have permission to use.

<Tip>
  After selecting or cloning a voice, make a test call to confirm it sounds as expected before deploying to a live campaign or number.
</Tip>