A persistable snapshot of the audio unit’s properties and parameters, suitable for saving in a user’s document.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
Hosts may use this property to save and restore the state of an audio unit being used. Some state, such as a parameter value, is suitable for saving in a user preset. Other state, such as a synthesizer’s master tuning setting, could be considered global state suitable for saving in a user document.
Subclasses that do not implement this property interface with the
full property instead.
This version 3 property is bridged to the version 2 kAudioUnitProperty_ClassInfoFromDocument API.