So sorry, Ron. I'm not very technically inclined. I really didn't exactly understand what you were referring to when you mentioned "UI" (User interface) LOL. The only info I could find was that the user interface of the DAC consists of buttons, a control ring, and a display. You can also use it's remote control. You can also use software applications to control the DAC (I'm not familiar with this, as I don't use it). Hope this answers your question.
Ken