What should I do if I can't hear anything when I connect a microphone to my computer?

Question

Audio

The question is, when we connect a microphone (SVEN MK - 390) nothing is heard. The sound check bar is about one-eighth full, and no one is making any sounds. We literally tried everything. The microphone itself is working, tested on another device. Windows sees it too. But he does not hear voices. As if some kind of constant sound comes from the computer itself. That's all at this volume level.