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# kAudioQueueProperty_IsRunning

Value is a read-only `UInt32` value indicating whether or not the audio queue is running. A nonzero value means running; `0` means stopped. A notification is sent when the associated audio queue starts or stops, which may occur sometime after the [`AudioQueueStart(_:_:)`](/documentation/AudioToolbox/AudioQueueStart(_:_:)) or [`AudioQueueStop(_:_:)`](/documentation/AudioToolbox/AudioQueueStop(_:_:)) function is called.

```
var kAudioQueueProperty_IsRunning: AudioQueuePropertyID { get }
```

---

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