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Release notes

Minimax support added to Voice Design Lab for voice design and cloning

19, Mar 2026

Voice Design Lab now supports the Minimax provider for both prompt-based voice design and audio cloning. This expands control over voice quality by allowing longer reference audio and more detailed voice capture.

What’s new

  • Minimax provider support: Available for voice design and cloning workflows.
  • Long-form audio input: Supports 10 seconds to 5 minutes for cloning.
  • Provider toggle: Switch between Telnyx and Minimax in the UI or API.
  • API parameter update: Set "provider": "minimax" in design and clone requests.
  • Cross-platform usage: Use Minimax voices in TTS API, Call Control, and AI Assistants.

Why it matters

  • Improves voice fidelity for cloning with longer, more expressive audio samples.
  • Reduces iteration cycles when capturing tone, pacing, and speaking style.
  • Simplifies provider selection with a single workflow across UI and API.
  • Enables broader voice coverage for use cases that need longer recordings.

Example use cases

  • Clone a support agent voice from a recorded call for consistent IVR playback.
  • Design branded voices with more nuanced tone using longer reference material.
  • Build multilingual assistants with provider-specific voice characteristics.

Getting started

minimax in design lab.gif

  1. Open Voice Design Lab in the Mission Control Portal.
  2. Select Minimax using the provider toggle.
  3. Choose Design a voice or Upload Audio.
  4. For API usage, set "provider": "minimax" in /v2/voice_designs or /v2/voice_clones.
  5. Retrieve the voice ID and use it in TTS, Call Control, or AI Assistant configs.

Deploy Everywhere

Your custom voice works across the full Telnyx stack:

• AI Assistants — give your agent a consistent brand voice • Call Control speak — custom TTS in programmatic call flows • TTS API — integrate into any application via WebSocket or REST

Full API Access

Everything in the portal is also available programmatically:

• /voicedesigns — create and iterate on voice designs • /voiceclones — clone from audio or save a design as a usable voice

Try it out today

You can head to the Mission Control Portal and head to the Voice Design Lab to test or take a look at our developer documentation to design at scale.