Play sound while background window?

Just wondering if any of you guys know of a way to make Ultra play it’s game sound while it’s a background window. A lot of the times I’m playing in a lobby and it’s not my turn I alt tab out of the game and miss my turn, alt tab when waiting for someone to join the lobby. A lot of new PC titles have this as an option in there game and sometimes add it later on. I’m guessing it’s pretty simple to add this as an option. What are your guys thoughts on this?

Get a second monitor

While that may be one way to see what’s going on in the game, it still doesn’t fix the fact that there’s no option to listen to the game while it’s a background window. I was thinking there might be a way to mod this option in but I have no idea about modding.