New controls for voice speed and background audio

The Voice tab now includes two adjustments for Telnyx Assistants. You can set speech speed for Natural HD voices and you can control background audio volume for predefined media.

What’s new

• Voice speed control: Set faster or slower playback for Natural HD voices.
• Background audio volume: Adjust volume levels for predefined media assets.

Why it matters

• Reduces the need for external audio processing.
• Improves tuning for branded or environment-specific voice profiles.
• Simplifies control of media balance during scripted interactions.

Example use cases

• Slowing speech for support flows with complex instructions.
• Reducing background track volume during key prompts.

Getting started

1. Open Mission Control Portal and navigate to Voice AI.
2. Select your Assistant and open the Voice tab.
3. Adjust voice speed and background audio volume.
4. Save and test your configuration.

Try it out here Mission Control Protocol.