Magic Music Visuals

I can use the microphone option I was just wondering if there was a way to run music straight to the program through an audio interface. My ddj has a line out to my scarlett interface the output from that plays through my obs. It isn't a huge issue but I feel it would create a more clean Visual resp...

I can not find out how to run output other than the preview mode. I can't find any options to an actual output at all.
Also I would like to be able to use live music is there any way to run a audio interface through this program?