+ route_group_combo.set_sensitive (true);
+ strict_io_combo.set_sensitive (true);
+ insert_at_combo.set_sensitive (true);
+ break;
+ case VCAMaster:
+ mode_combo.set_sensitive (false);
+ channel_combo.set_sensitive (false);
+ instrument_combo.set_sensitive (false);
+ configuration_label.set_sensitive (false);
+ mode_label.set_sensitive (false);
+ instrument_label.set_sensitive (false);
+ route_group_combo.set_sensitive (false);
+ strict_io_combo.set_sensitive (false);
+ insert_at_combo.set_sensitive (false);
+ break;
+ case MidiBus:
+ mode_combo.set_sensitive (false);
+ channel_combo.set_sensitive (false);
+ instrument_combo.set_sensitive (true);
+ configuration_label.set_sensitive (false);
+ mode_label.set_sensitive (true);
+ instrument_label.set_sensitive (true);
+ strict_io_combo.set_sensitive (true);
+ insert_at_combo.set_sensitive (true);