Audacity + duo-capture

I’m really upset about this… I prefer Audacity over Garageband… Cause with Audacity I know how to make it record 2 tracks instead of 1 stereo…
I have a duo capture ex connected to my iMac and everything is fine except Audacity doesn’t recognize it… Garageband, however, does… I just can’t change the input or output to anything else… last time I could… IDK what’s going on

Duo capture by who?