---
title: kIOAudioDeviceActive
framework: kernel
role: symbol
role_heading: Enumeration Case
path: kernel/ioaudiodevicepowerstate/kioaudiodeviceactive
---

# kIOAudioDeviceActive

## Declaration

```occ
kIOAudioDeviceActive = 2
```

## Discussion

Discussion State when one ore more IOAudioEngines are in use. This state transition must complete before the system will begin playing audio.