Luke
It would be great if volume change for the group could be splitted by half. Now, using F11,F12 volume change for example 0, 6, 13, 19, 25, 31 etc. But for me if I have two displays playing at the same time as group the gap between volume changes are to big. Need to change volume also in the source as it is to loud. I've two ideas: splitting by half so: 0, 3, 6, 9, 12, 15 (maybe after 40% there's no need to be so precise) or adding a shortcut as in native volume change in macOS: Shift+Option+F11/F12 (quarter changes).