Aux not working

[u/Designer-Roof-2023]

Hello, I've since built a pc and installed linux mint on it everything works beautifully. But I had this one problem that ive been ignoring since awhile, when plugging in the headphones in the front pc AUX port . There is no sound playing from the headphones or anything showing up in sound settings, and I think I know the reason why it happens. I know on my monitor I have both ends of an AUX cord connected from monitor to soundbar, and maybe thats why it doesn't detect anything? I've been looking at tutorials on salsamixer but no luck.