implements:

buses tab
composite buttons
bus composite events

src/nvda_voicemeeter/models.py

@@ -26,6 +26,10 @@ def _make_output_cache(vm) -> dict:
             }
 
 
+def _make_bus_mode_cache(vm) -> dict:
+    return {**{f"BUS {i}||COMPOSITE": vm.bus[i].mode.get() for i in range(vm.kind.num_bus)}}
+
+
 _patch_insert_channels = (
     "left",
     "right",