Create custom TTS voices with Telnyx Voice Design Lab

Our new Voice Design Lab lets developers create custom text-to-speech voices using Qwen 3 TTS. Generate voices from natural language prompts or clone them from short audio recordings, then use them across Telnyx voice and TTS services.

What’s new

• Prompt-based voice design: Describe tone, gender, or style to generate a new synthetic voice.
• Voice cloning from audio: Upload or record a short sample to reproduce a voice identity.
• Cross-product voice usage: Use custom voices in AI Assistants, Call Control speak, and the TTS API.
• Multilingual synthesis: Generate speech in multiple languages using the same voice profile.
• Portal-based workflow: Create and test voices in the Voice Design Lab interface.
• API voice management: Create voice clones programmatically using the voice clone endpoint.

Why it matters

• Reduces time required to create branded or consistent voice experiences.
• Simplifies voice generation without training datasets or studio recording.
• Improves control over speech identity across AI agents and telephony workflows.
• Enables consistent voice output across languages and applications.

Example use cases

• Customer support agents that use a consistent brand voice.
• Appointment reminders generated with a cloned human voice.
• AI assistants that speak with a custom persona.
• Interactive IVR systems with a unique voice identity.

Getting started

1. Open Voice Design Lab in the Mission Control Portal.
2. Choose a creation method: Design a voice with a prompt or Clone from audio.
3. Record or upload a short audio sample if cloning.
4. Generate and test speech using the built-in playback tool.
5. Select the new voice in AI Assistants, Call Control speak, or the TTS API.

You can also create voice clones programmatically using the voice clone API endpoint described in the developer documentation.

Learn more in our developer documentation or contact your Telnyx team.