[OBS] Game sound is way too loud compared to voice.

Hi, hopefully this is the right place to ask this.

I'm starting a stream with some friends. We play games while on teamspeak.

The problem is, OBS records the game sound way too loud. No matter what I do I can't make it low enough while also being able to hear teamspeak as normal.

I've gone to the in-game audio settings and turned it all as low as I can where I can still hear it while playing, but in the recording; it's full volume and way too loud.

Oh and it's not just the one game, it happens in all games I play.

I know there is the desktop sound slider on the right in OBS but if I turn that down, it also turns teamspeak down to the point where my friends voices cannot be heard.

I don't know if it has something to do with the fact that I have game audio coming from the optical port, into my A40 mixamp then to my headset as opposed to a normal headset jack.

Is there a way to just turn game sounds up and down while streaming without using the slider or the in-game audio settings?

Hopefully I explained the issue well enough.

Thanks in advance!