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# kAudioUnitProperty_FactoryPresets

So-called *factory presets* (as opposed to user-configured presets) are ones supplied with an audio unit by the manufacturer. You choose the active preset by setting the `kAudioUnitProperty_PresentPreset` property.

```
var kAudioUnitProperty_FactoryPresets: AudioUnitPropertyID { get }
```

## Discussion

A read-only <doc://com.apple.documentation/documentation/CoreFoundation/CFArray> array of [`AUPreset`](/documentation/AudioToolbox/AUPreset) structures.

When obtaining a factory preset array from an audio unit with the [`AudioUnitGetProperty(_:_:_:_:_:_:)`](/documentation/AudioToolbox/AudioUnitGetProperty(_:_:_:_:_:_:)) function, you own the reference to the array and are responsible for later releasing it by calling the <doc://com.apple.documentation/documentation/CoreFoundation/CFRelease> function.

---

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