<!--
{
  "documentType" : "article",
  "framework" : "AudioToolbox",
  "identifier" : "/documentation/AudioToolbox/1534149-audio-unit-migration-properties",
  "metadataVersion" : "0.1.0",
  "role" : "collectionGroup",
  "title" : "Audio Unit Migration Properties"
}
-->

# Audio Unit Migration Properties

## Topics

### Constants

[`var kAudioUnitMigrateProperty_FromPlugin: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitMigrateProperty_FromPlugin)

[`var kAudioUnitMigrateProperty_OldAutomation: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitMigrateProperty_OldAutomation)


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)