---
title: kIOAudioChannelLabel_Unknown
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646426-anonymous/kioaudiochannellabel_unknown
---

# kIOAudioChannelLabel_Unknown

## Declaration

```occ
kIOAudioChannelLabel_Unknown = 0xFFFFFFFF
```