Ur22c streaming sound issue on Mac

hi, I’m using ur22c with m3 pro MacBook.

I’m trying to broadcast via OBS using the stream mix feature of the new dspmix 3.0. But I’m constantly having sound issues.
The Mac sound I hear is fine, but I’m having a problem with the Mac’s sound being streamed through obs. The sound seems to be ripping, and only very terrible quality sounds are streamed.

What’s the problem?