Audio Node Wrangler Addon
GDScript
With this add-on you can manage audio node volume and bus settings in the editor on one screen as well as an in-game HUD. This allows non-programmers to set sound levels and busses during play testing. The resulting configuration file can then be sent to the programmer to update the sound node settings with a click of a button. (See readme or project repository for full details. Demo available if full add-on repository is cloned.)
Get it → github.com