MY problem is that if I am in web call, the transcriber recognizes my input well when I am saying out a number with ending multiple zeroes, but when I ask the agent to repeat what I said it always messes up the zeroes at the end of the number, because it says less zeroes than what I said to the agent. On chat it works fine. How can I solve it? https://cdn.discordapp.com/attachments/1428696570140037264/1428696570408337472/Kepernyokep_2025-10-17_123411.png?ex=6941395e&is=693fe7de&hm=e50c556fd948d84f7f11d9b4a3a431cbde0d57daf2b306cda2397c6e9d99977e& https://cdn.discordapp.com/attachments/1428696570140037264/1428696570966183996/Kepernyokep_2025-10-17_123228.png?ex=6941395e&is=693fe7de&hm=dc21bead6d3ce7c197eae5e5a5b2d2b04a152177915f71c72ecd242a94ace29f&

Hi, could you please provide a call id where you experienced this issue? We would like to review the logs to identify the cause.

yeah

Hi Enyedi Péter, Please update your assistant’s voice configuration to match the example below. This should prevent the model from misreading or shortening zeroes at the end of numbers during voice calls:

{
  "voice": {
    "provider": "vapi",
    "voiceId": "Paige",
    "chunkPlan": {
      "enabled": true,
      "minCharacters": 30,
      "formatPlan": {
        "enabled": false,  // DISABLE THIS - it may be reformatting numbers
        "formattersEnabled": "none",
        "numberToDigitsCutoff": 0
      }
    },
    "inputPreprocessingEnabled": false,  // DISABLE to prevent optimization
    "inputReformattingEnabled": false    // DISABLE to prevent reformatting
  }
}

Once you’ve updated it, please test again using the same call flow and let us know if the zeros are now being recognized correctly.

still not good

To fully disable all voice formatting and prevent numbers (including trailing zeros) from being reformatted, set the following in your assistant's configuration:

json
{
  "voice": {
    "chunkPlan": {
      "enabled": false
    }
  }
}

This will ensure the raw LLM output is used for speech, bypassing all formatting steps. Note: "formattersEnabled" does not support "none" as a value; only disabling the formatting plan as shown above is supported (according to the documentation you have found). Source: - [Voice formatting plan](https://docs.vapi.ai/assistants/voice-formatting-plan)