I’m unable to locate the two XLR mics I’ve got plugged in to the Behringer 404. It sees them in Audition (a friend’s acct) but not Audacity. I went through preferences w/o luck.
Plug in the 404, let it settle and then start Audacity.
It should arrive as USB Audio CODEC, and the microphones will be stereo left and right.
There may be a thing about security permissions, but I’m fuzz about that. Most people have trouble starting Audacity in the wrong order.
There’s a “sticky” topic about that here: No recording level