Are you plugging the interface into your computer directly or going through an extension or hub of some sort? I pinpointed an issue kind of like over the weekend that that turned out to be caused by my USB switcher hub (this one)
When you connected the FireWire out, where were you seeing the "weird mix?"
You can try combining Studio One (free download with purchase of mixer) and Loopback. Take the mix from Studio One and configure it as an audio device for OBS
Hey, just wanted to let you know I fixed it with a simple ground loop isolator I was using on my Nintendo Switch. Zero noise now, its dead silent. I almost bought one of the expensive USB isolators but that wasn't necessary at all. I just used this:
For sure. Let me know what solution (if any) you end up finding. Thinking about trying this out but it seems kinda expensive for what it is haha.