diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 7a271bbfc9..11a93c4170 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -458,6 +458,10 @@ public:
 	PBD::Signal<void()> Located;
 
 	PBD::Signal<void(RouteList&)> RouteAdded;
+	/* This is emitted after one or more routes are added that are actually
+	   Tracks with an instrument plugin.
+	*/
+	PBD::Signal<void(RouteList&)> InstrumentRouteAdded;
 	/** Emitted when a property of one of our route groups changes.
 	 *  The parameter is the RouteGroup that has changed.
 	 */
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 0e08e3de9b..3b95788940 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -2828,6 +2828,9 @@ Session::new_midi_track (const ChanCount& input, const ChanCount& output, bool s
 
 		add_routes (new_routes, input_auto_connect, !instrument, order);
 		load_and_connect_instruments (new_routes, strict_io, instrument, pset, existing_outputs);
+		if (instrument) {
+			InstrumentRouteAdded (new_routes);
+		}
 	}
 
 	return ret;
@@ -2908,6 +2911,9 @@ Session::new_midi_route (RouteGroup* route_group, uint32_t how_many, string name
 
 		add_routes (ret, false, !instrument, order);
 		load_and_connect_instruments (ret, strict_io, instrument, pset, existing_outputs);
+		if (instrument) {
+			InstrumentRouteAdded (ret);
+		}
 	}
 
 	return ret;