Don't know if you are on windows 10, but it sounds like you are. There is another recent thread on here about how to solve it. If you haven't already done it, go to windows privacy settings and make sure to allow apps access to your microphone. If you that, then it should work again. Hope I could be of help.
Hi, I haven't been able to find anything about this online. If I pose this question to Google, all it turns up is that the umc404hd provides phantom power and has midi ports, which I already know. I know that the four behringer bcr 2000 I have, two of which are running as zaquencers, provide power over midi, but does anyone know whether or not the umc404hd does, too?