Audio/Video Synch

Capturing from DIGITNOW! 4K HDMI UltraHD Video Capture device. Audio is consistently 3 frames ahead of the video. Obviously, it is barely noticeable and is a simple fix in Adobe Premiere (or any video editor) but none of the "synch adjusters" within OBS seem to do anything. I just want to delay the audio by 3 frames (at 29.97) or 100.1 ms. Unless I'm mistaken, the "Synch Adjust" in OBS moves the video with reference to the audio in only a positive direction (further out of synch in my case), but does not affect the audio (other than making things more out of synch by only moving the video "away" from the synch point). I may be totally wrong but any thoughts?

I remember reading somewhere that you can use negative numbers for the audio delay. I may be mistaken but.....