---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17513#article
headline: "17513: Duplicate audio channel"
url: https://www.twilio.com/docs/api/errors/17513
inLanguage: en
dateModified: 2026-07-31T15:59:35.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17513: Duplicate audio channel

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio cannot create a new transcription when both participants share the same `audioChannelIndex` value.

### Possible causes

* Both participants are assigned to channel 1.
* Both participants are assigned to channel 2.

### Possible solutions

* Assign one participant to channel 1 and the other participant to channel 2.
* Make sure each participant uses a unique `audioChannelIndex`.

#### Additional resources

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