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

# kIOAudioSelectorControlSubTypeChannelLevelInstrumentLevel

## Declaration

```occ
kIOAudioSelectorControlSubTypeChannelLevelInstrumentLevel = 'istl'
```