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Lesson 4 of 6 — Choose and tune your agent’s voice.
Complete this after behavior is stable but before call testing.

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Where this lives

Navigate to Channels > Voice > Agent Voice set-up-project You will see two configurable sections:

Assistant

The primary speaking voice

Disclaimer

Used only for legal or informational disclosures (if enabled)

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What you are configuring

Each voice entry has three layers:
1

Voice selection

Who the agent sounds like
2

Weighting

If multiple voices are used, how they’re distributed
3

Voice tuning

Stability, clarity, and speed adjustments

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Configure your agent voice

1

Select the agent voice

In the Assistant section:
  • Click Change to open the Voice Library
  • Browse voices using the Explore or Favorites tabs
  • Filter by Language, Region, and Gender
  • Preview each voice using the play button or enter custom text
Choose a voice that:
  • Matches your audience’s expectations
  • Sounds neutral and professional
  • Remains pleasant over repeated listening
Once selected, click Select.
2

(Optional) Add multiple agent voices

You can add more than one agent voice and split usage between them.
  • Click New voice
  • Select an additional voice
  • Assign a percentage weight (for example, 70% / 30%)
  • You want subtle variation across calls
  • You are testing two voices in parallel
  • Different voices for different scenarios
3

Configure voice settings

Next to each voice, click the Settings (gear) icon to open advanced tuning.
Controls how consistent the voice sounds over time. Higher values keep tone and delivery more uniform across responses.
  • Higher = more predictable, less expressive
Recommended: 0.7 or above for reliable performance.
Click Done to save settings.
4

Configure disclaimer voice (if enabled)

If your agent uses a disclaimer:
  • Expand the Disclaimer section
  • Select a voice (can be the same or different from the agent)
Best practices:
  • Use a clear, neutral voice
  • Avoid expressive or casual tones
  • Keep speed slightly slower than the main agent
Example disclaimer text: “This call may be recorded for quality and training purposes.”
5

Publish changes

Once satisfied:
  • Click Publish
  • Changes will apply to the selected environment

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Verify your voice settings

After publishing, make at least one test call and listen to:
  • Voice sounds clear and welcoming
  • Pacing feels natural
  • No awkward pauses
  • Voice remains consistent across turns
  • Responses flow naturally
  • No sudden changes in tone or speed
  • Voice maintains professionalism
  • Instructions are clear
  • Pacing allows for comprehension
Success criteria:
  • Voice sounds consistent throughout the call
  • No awkward pacing or unnatural pauses
  • Audio matches expectations across all conversation turns
If something feels off, adjust stability first, then speed.