WU: AUDistortion 1.21

The WU (Wrapped Units) Series audio units effectively extend the user interface of the native Audio Unit systems, rendering it accessible to all host applications that accommodate AUv3 audio processing plugins. This functionality is beneficial even for hosts lacking support for UI-less units. Users can leverage these effects, which are familiar to GarageBand on macOS and iOS, across a broad range of host applications, ensuring consistency in sound quality throughout their projects.