USB Audio Class 2.0 supported features

Hi,
I am wondering which features of the USB Audio Class 2.0 spec the UR series, specifically the UR22C, implements.
Do the buttons and knobs on the front panel of the UR22C manipulate the audio only on the hardware, or are the states of the buttons/knobs also sent to the PC using the Interrupt Data Message? (Section 6 of the UAC 2.0 spec).

A real world application of this feature would be the updating of the volume and mute settings on the PC/audio application side whenever the user moves the knobs.