---
title: factoryPresets
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/auaudiounit/factorypresets
---

# factoryPresets

A collection of presets provided by the audio unit’s developer.

## Declaration

```swift
var factoryPresets: [AUAudioUnitPreset]? { get }
```

## Discussion

Discussion A preset provides audio unit users with an easily-selectable, fine-tuned set of parameters defined by the developer. This version 3 property is bridged to the version 2 kAudioUnitProperty_FactoryPresets API.

## See Also

### Managing Presets

- [fullState](audiotoolbox/auaudiounit/fullstate.md)
- [fullStateForDocument](audiotoolbox/auaudiounit/fullstatefordocument.md)
- [currentPreset](audiotoolbox/auaudiounit/currentpreset.md)
- [supportsUserPresets](audiotoolbox/auaudiounit/supportsuserpresets.md)
- [userPresets](audiotoolbox/auaudiounit/userpresets.md)
- [saveUserPreset(_:)](audiotoolbox/auaudiounit/saveuserpreset(_:).md)
- [deleteUserPreset(_:)](audiotoolbox/auaudiounit/deleteuserpreset(_:).md)
- [presetState(for:)](audiotoolbox/auaudiounit/presetstate(for:).md)