---
title: kIOAudioSelectorControlSubTypeChannelLevelMinus20dBV
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646407-anonymous/kioaudioselectorcontrolsubtypechannellevelminus20dbv
---

# kIOAudioSelectorControlSubTypeChannelLevelMinus20dBV

## Declaration

```occ
kIOAudioSelectorControlSubTypeChannelLevelMinus20dBV = '20db'
```