Maybe its mentiand earlier in a topic , but here is my tip .
I have freedrum running on my windows 10 desktop , next to the desktop i have my laptop running with music .
Now i put a splitter between the desktop and the speaker system and connectid a cable between the headphone outlet from the laptop and the splitter .
So i have drums and music on one system , the only thing you have to do is level out the volumes between the drum and the music .
btw i running reaper on the desktop .
greats and have fun .