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
Customer Service
Use warm, professional voices that convey empathy and helpfulness
Sales & Marketing
Choose energetic, engaging voices that capture attention
Technical Support
Select clear, articulate voices that are easy to understand
Healthcare
Use calm, reassuring voices that build trust
Configuring Voice in Agents
Using the Developer Portal
- Navigate to Agents
- Select or create an agent
- Go to Voice Settings
- Choose your voice provider
- Select a specific voice
- Preview the voice
- 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:- Preview: Listen to voice samples in the portal
- Test Calls: Make test calls with different voices
- Get Feedback: Gather feedback from team members
- 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
- Match Brand: Choose voices that align with your brand identity
- Test Thoroughly: Test voices with real call scenarios
- Consider Audience: Select voices your audience will find relatable
- Consistency: Use consistent voices across similar use cases
- Accessibility: Ensure voices are clear and easy to understand
- Update Regularly: Review and update voice selections periodically
Troubleshooting
Voice sounds unnatural
Voice sounds unnatural
- Try a different voice from the same provider
- Adjust speaking rate
- Review agent instructions for better flow
- Consider switching voice providers
Voice not matching language
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
Audio quality issues
Audio quality issues
- Check network connection
- Verify voice provider settings
- Test with different voices
- Contact support if issues persist
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
- Contact support: support@call24x7.ai