> ## Documentation Index
> Fetch the complete documentation index at: https://doc.call24x7.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice Models

> Configure voice models for your AI agents

## Overview

Voice models determine how your AI agents sound during phone calls. Call24x7.AI supports multiple voice providers and a wide variety of voices to match your brand and use case.

## Available Voice Providers

Call24x7.AI integrates with leading voice synthesis providers:

* **Cartesia**: High-quality, natural-sounding voices
* **ElevenLabs**: Premium voice cloning and synthesis
* **DeepDub**: Multilingual voice solutions

## Selecting a Voice

### Voice Characteristics

Consider these factors when choosing a voice:

* **Gender**: Male, female, or neutral
* **Age**: Young, middle-aged, or mature
* **Tone**: Professional, friendly, calm, energetic
* **Accent**: Regional accents and pronunciations
* **Language**: Native language support

### Matching Voice to Use Case

<CardGroup cols={2}>
  <Card title="Customer Service" icon="headset">
    Use warm, professional voices that convey empathy and helpfulness
  </Card>

  <Card title="Sales & Marketing" icon="megaphone">
    Choose energetic, engaging voices that capture attention
  </Card>

  <Card title="Technical Support" icon="wrench">
    Select clear, articulate voices that are easy to understand
  </Card>

  <Card title="Healthcare" icon="heart">
    Use calm, reassuring voices that build trust
  </Card>
</CardGroup>

## Configuring Voice in Agents

### Using the Developer Portal

1. Navigate to **Agents**
2. Select or create an agent
3. Go to **Voice Settings**
4. Choose your voice provider
5. Select a specific voice
6. Preview the voice
7. Save your selection

### Using the API

When creating agents via API, specify the voice configuration in the agent settings.

## Voice Customization

### Speaking Rate

Adjust how fast or slow the agent speaks:

* **Normal**: Standard speaking rate
* **Slow**: Slower for clarity or emphasis
* **Fast**: Faster for efficiency (use carefully)

### Emphasis and Intonation

Some voice providers support:

* **Emphasis markers**: Add emphasis to specific words
* **Pauses**: Control pauses for natural flow
* **Intonation**: Adjust tone for questions vs. statements

## Language Support

Voice models support multiple languages:

* **English**: Multiple accents (US, UK, Australian, etc.)
* **Spanish**: Various regional variations
* **French**: European and Canadian French
* **German**: Standard and regional German
* **And more**: Check provider documentation for full language list

### Multilingual Agents

Configure agents to:

* Detect the caller's language
* Switch languages mid-conversation
* Maintain consistent voice across languages

## Voice Quality Considerations

### Audio Quality

* **Sample Rate**: Higher sample rates provide better quality
* **Bitrate**: Higher bitrates for clearer audio
* **Latency**: Balance between quality and real-time performance

### Naturalness

Modern voice synthesis provides:

* **Natural pauses**: Realistic breathing and pauses
* **Emotional expression**: Convey emotions appropriately
* **Pronunciation**: Accurate pronunciation of names and terms

## Testing Voices

Before deploying an agent:

1. **Preview**: Listen to voice samples in the portal
2. **Test Calls**: Make test calls with different voices
3. **Get Feedback**: Gather feedback from team members
4. **Compare**: Test multiple voices for the same use case

## Voice Provider Details

### Cartesia

* **Strengths**: High quality, low latency, natural-sounding
* **Best for**: Real-time conversations, customer service
* **Languages**: Multiple languages supported

### ElevenLabs

* **Strengths**: Voice cloning, premium quality, emotional range
* **Best for**: Brand-specific voices, high-end applications
* **Languages**: Extensive language support

### DeepDub

* **Strengths**: Multilingual, accent support, regional variations
* **Best for**: International operations, diverse customer base
* **Languages**: Wide range of languages and accents

## Best Practices

1. **Match Brand**: Choose voices that align with your brand identity
2. **Test Thoroughly**: Test voices with real call scenarios
3. **Consider Audience**: Select voices your audience will find relatable
4. **Consistency**: Use consistent voices across similar use cases
5. **Accessibility**: Ensure voices are clear and easy to understand
6. **Update Regularly**: Review and update voice selections periodically

## Troubleshooting

<AccordionGroup>
  <Accordion title="Voice sounds unnatural">
    * Try a different voice from the same provider
    * Adjust speaking rate
    * Review agent instructions for better flow
    * Consider switching voice providers
  </Accordion>

  <Accordion title="Voice not matching language">
    * Verify language settings match the voice
    * Check that the voice supports the target language
    * Test with a different voice for that language
  </Accordion>

  <Accordion title="Audio quality issues">
    * Check network connection
    * Verify voice provider settings
    * Test with different voices
    * Contact support if issues persist
  </Accordion>
</AccordionGroup>

## Voice Samples

Listen to voice samples in the Developer Portal to help you choose the right voice for your use case.

## Support

For voice-related questions:

* Check voice provider documentation
* Visit our [Help Center](https://manage.call24x7.ai)
* Contact support: [support@call24x7.ai](mailto:support@call24x7.ai)