Asynchronously creates an audio unit instance.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
The component to instantiate.
Options for loading the unit in-process or out-of-process.
The block called when instantiation has completed. The block parameters are defined as follows:
An initialized audio unit if the operation succeeded, or
nilif it failed.
An error if the operation failed, or
nilif it succeeded.
Certain types of audio units must be instantiated asynchronously, such as version 3 units with a view.