Selective Muting for private voice chats within a group voice chat

I was thinking it would be nice to be able to have a short private conversation with only specific people, without leaving your larger group chat. This could be being able to select certain people only and you will become muted to everyone but those other people. We use Discord a lot for online role-playing, and there are times where a GM needs to speak to one specific player or a small group of players for a brief comment or two that is not worth setting up a whole extra chat for. This will allow for more flexibility and quicker gameplay. This may have practicality for other formats as well where any 2+ people need to have a quick sidebar away from the group but still be present.