---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17512#article
headline: "17512: Non-integer audioChannelIndex"
url: https://www.twilio.com/docs/api/errors/17512
inLanguage: en
dateModified: 2026-07-31T15:59:35.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17512: Non-integer audioChannelIndex

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio can't create the transcription because the participant's `audioChannelIndex` isn't an integer. Twilio does not coerce floating-point values to integers.

### Possible causes

`audioChannelIndex` is a floating-point number (for example, `1.5`) instead of an integer.

### Possible solutions

Set `audioChannelIndex` to an integer, such as `1` or `2`.

#### Additional resources

* [Specify participant information](https://www.twilio.com/docs/voice/api/batch-transcription-resource#specify-participant-information)