Question / Help Splitting Audio on OBS

Ok im going to try and lay this out clearly.

I have my audio split on my computer, mumble comes through my headset (which i configured in mumble audio settings.
All other sounds come through my speakers as this allows me to hear game sound/music and still clearly hear people on mumble.

Is there a way to keep this set up and set OBS to pick up audio from both channels?

Hmm, the only easy way I can think of would be using Virtual Audio Cable. (unfortunately not free software)

VAC Line1 -> default device -> send to speakers
VAC Line2 -> mumble -> send to headset
VAC Line3 -> receive Line1 and Line2 audio and use that in OBS as desktop sound.

Check my audio guides section for more examples: http://blog.hemp-society.de/p/streaming-guides.html