Hi Raino,
So it’s very hard to find how to do this but a year or so ago I found an old SOS article that taught me. Basically in order to get this to work you have to do a crap-ton of work. But it’s worth it. I don’t really know how to explain it properly but I’ve uploaded an expression map that I made with groups and you should be able to reverse engineer it from there. Hope this helps!
“EDIT”
Thinking about this more. You basically have to make a slot for every possible variation. So if you’ve got 3 articulations in Group 1 and 3 in Group 2 that means a total of 9 slots. The example I uploaded has 12 in group 1 and 6 in group 2 so a total of 72 slots. Thus the time consuming work. But once you get it going it’s great!
Spit Harp Gliss Groups.expressionmap.zip (8.93 KB)