# Create Allocates and initializes an instance of the audio box class. ``` static OSSharedPtr Create(IOUserAudioDriver *in_driver, bool in_is_acquirable, OSString *in_box_uid); ``` ## Parameters `in_driver` The [`IOUserAudioDriver`](/documentation/AudioDriverKit/IOUserAudioDriver) that owns this object. `in_is_acquirable` A Boolean value that specifies if the box supports being acquired. `in_box_uid` The name of the box, as an . ## Return Value A poiner to an [`IOUserAudioBox`](/documentation/AudioDriverKit/IOUserAudioBox), if allocation and initialization succeeded. ## Discussion If you subclass [`IOUserAudioBox`](/documentation/AudioDriverKit/IOUserAudioBox) to override this class’ behavior, don’t use [`Create`](/documentation/AudioDriverKit/IOUserAudioBox/Create) to allocate and initialize the custom subclass. --- Copyright © 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)