# IOUserMIDIDriver ``` class IOUserMIDIDriver; ``` ## Topics ### Instance Methods [`kern_return_t AddObject(IOUserMIDIObject *object);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/AddObject) [`OSSharedPtr GetMIDIObjectForObjectID(IOUserMIDIObjectID objectID) const;`](/documentation/MIDIDriverKit/IOUserMIDIDriver/GetMIDIObjectForObjectID) [`OSSharedPtr GetName() const;`](/documentation/MIDIDriverKit/IOUserMIDIDriver/GetName) [`OSSharedPtr GetWorkQueue() const;`](/documentation/MIDIDriverKit/IOUserMIDIDriver/GetWorkQueue) [`virtual kern_return_t NewUserClient(uint32_t type, IOUserClient **userClient);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/NewUserClient) [`kern_return_t RemoveObject(IOUserMIDIObject *object);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/RemoveObject) [`kern_return_t SetName(OSString *name);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/SetName) [`virtual kern_return_t Start(IOService *provider);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/Start) [`virtual kern_return_t StartIO(OSArray *deviceList);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/StartIO) [`virtual kern_return_t Stop(IOService *provider);`](/documentation/MIDIDriverKit/IOUserMIDIDriver/Stop) [`virtual kern_return_t StopIO();`](/documentation/MIDIDriverKit/IOUserMIDIDriver/StopIO) [`virtual void free();`](/documentation/MIDIDriverKit/IOUserMIDIDriver/free) [`virtual bool init();`](/documentation/MIDIDriverKit/IOUserMIDIDriver/init) ## Relationships ### Inherits From [`IOService`](/documentation/DriverKit/IOService) --- 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)