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Filler audio adds natural conversation sounds (like “hmm” or “one moment”) while your AI assistant processes responses. This creates a more human-like interaction by eliminating awkward silences.

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How It Works

When enabled, your AI assistant will:
  • Use short audio fillers during processing time
  • Maintain engagement while formulating responses
  • Signal active listening to the caller

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Benefits

  1. Improved Conversation Flow
    • Eliminates dead air
    • Keeps callers engaged
    • Reduces hang-ups
    • Creates natural dialogue rhythm
  2. Enhanced User Experience
    • More human-like interaction
    • Less awkward waiting
    • Better caller retention
    • Increased trust

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Setup

  1. Open your assistant and go to Voice & speech
  2. Find the Filler audios section
  3. Click Enable fillers
  4. Click Save assistant

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Best Practices

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Where Filler Audio Applies

  • Filler audio belongs to the Pipeline engine, and the section only appears when your assistant uses it
  • It covers the pause while speech is transcribed, the model answers and the reply is spoken
  • The Dualplex and Speech-to-speech engines generate speech directly, so there is no such pause to cover and no filler audio to set
  • Turning on secondary languages also turns filler audio off, because the phrases are recorded in one language

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Use Cases

  • Sales Calls: Keep prospects engaged
  • Customer Service: Show active listening
  • Lead Qualification: Maintain natural flow

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Testing

After enabling filler audio:
  1. Make a test call
  2. Listen for natural transition sounds
  3. Verify timing and appropriateness
  4. Adjust if needed
Tip: Start with filler audio enabled - you can always disable it if it doesn’t suit your use case.