Voice Generation getting slowed

accused-moccasin · 2025-05-08T05:10:13.034Z

I have been facing a issue where the voice generation gets really slow during the call and the pitch also gets low. Please check the below call to check the issue. Call ID: a1afc279-9475-4342-8839-165b5653e761 time stamp: 00:25-00:36 Response issue: The voice generation was very slow and the pitch got very low. Expected Response: Clear voice generation and even pitch throughout the call.

V

Vapi Support BotAPP•5/8/25, 5:11 AM

If you're experiencing slow voice generation with low pitch, try adjusting the voice model settings. For 11labs voices, set the style property to 0.0 as higher values can cause instability:

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

This configuration helps maintain consistent voice quality throughout calls.

Source:

Discord conversation about voice distortion

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

V

Vapi Support BotAPP•5/8/25, 5:11 AM

If you're experiencing slow voice generation with low pitch, try adjusting the voice model settings. For 11labs voices, set the style property to 0.0 as higher values can cause instability:

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

This configuration helps maintain consistent voice quality throughout calls.

Source:

Discord conversation about voice distortion

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

VVapi Support Bot If you're experiencing slow voice generation with low pitch, try adjusting the v...

D

DuckieAPP•5/8/25, 6:09 AM

Message marked as helpful by @! AetherMind!

M

managerial-maroon•5/8/25, 6:10 AM

As @Duckie told you, you can control the voice speed using voice configuration.

M

managerial-maroon•5/8/25, 6:10 AM

If you send me your voice configuration, I can find issue and fix it for you.

V

Vapi Support BotAPP•5/8/25, 6:11 AM

Based on the information I found, there's actually no direct way to control voice speed in 11labs, but you can improve voice consistency by adjusting these settings:

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

Setting

style

style

to 0.0 is crucial as higher values cause instability that affects pitch and perceived speed.

Sources:

V

Vapi Support BotAPP•5/8/25, 6:11 AM

Based on the information I found, there's actually no direct way to control voice speed in 11labs, but you can improve voice consistency by adjusting these settings:

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

{
  "voice": {
    "provider": "11labs",
    "voiceId": "your_voice_id",
    "style": 0.0,
    "stability": 0.5,
    "similarityBoost": 0.75
  }
}

Setting

style

style

to 0.0 is crucial as higher values cause instability that affects pitch and perceived speed.

Sources:

E

extreme-purple•5/8/25, 9:11 AM

Adjust assistant settings for reduced response delay, select efficient voice models, use appropriate audio formats and sample rates, and implement real-time speech processing.

Voice Generation getting slowed

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