TAKE A DEEP BREATH! Take a deep breath! It's okay! I'm a trained professional!

Aight first, LISTEN TO MY VOICE, first we're gonna wanna open the terminal and type in Alsamixer. Now the problem is that x870 has multiple audio devices! Some might be named something like 'USB Audio" or even "Realtek ALC[numbers]"

Try to find a setting called "Auto-Mute Mode" and disable it!

If this doesn't work, the good news is like Mint, Pop!_OS also uses Wireplumber! Open up Pavucontrol, which I think Pop!_OS just comes with or at least my friend told me it did, go to the Configuration tab, find the USB Audio tab, and change the profile to "Pro Audio" and then wait a bit and then switch it back to "Analog Stereo Duplex"! This works because it just works.

Lastly it could be a bios thing. Get into the BIOS, go to settings, then advances, and then find the Integrated Peripherals and ensure that the HD Audio Controller is enabled.

And if none of that works, it could be that Wireplumber is borked up and I have what is called a pro-gamer move. On Mint, this ALWAYS works!

systemctl --user stop wireplumber.service

rm -rf ~/.local/state/wireplumber

systemctl --user start wireplumber.service

Take it easy, gamer.