line-in audio no signal

Hey guys. New here, I'm sure it's been asked a million times and most likely answered. I have no one to talk to or find an answer/solution to my problem. That of which,... I CANT GET MY INTERFACE/DAW SIGNAL INTO OBS!!it doesn't read.no movement on the meter.... It's been 3DAYS of trying!!!.I've...

My problem is, that I connect an analog stereo to my sound blaster Z line-in. I can hear the audio fine on my PC but in OBS absolutely nothing gets picked up. I tried all possible combinations in the setting for AUX/Microphone and desktop speaker but neither the desktop audio nor the...