"Focus" in voice chat

I suggest that discord has a feature in which you can easily turn down the volume of all but a few people. Of course this can be done manually, but in large groups can be tedious to turn up and down all the time. Maybe a button next to peoples names to "focus" on them, and turn everyone else down. In large voice chats, this would allow better communication, and is a lot more convenient and temporary than moving channels. Example: Two gamers are playing e-football and are being incredibly loud while you try to listen to a friend of yours. You only need to hear one or two sentences, so it's not worth changing VC's. Focus would allow you to temporarily concentrate on the people you are actually listening to.