---
title: kIOAudioSelectorControlSubTypeClockSource
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646407-anonymous/kioaudioselectorcontrolsubtypeclocksource
---

# kIOAudioSelectorControlSubTypeClockSource

## Declaration

```occ
kIOAudioSelectorControlSubTypeClockSource = 'clck'
```