diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 656bbe8830..4433167948 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -346,8 +346,6 @@ public:
 	std::shared_ptr<RouteList> get_routes_with_internal_returns() const;
 	std::shared_ptr<RouteList> get_routes_with_regions_at (timepos_t const &) const;
 
-	std::shared_ptr<AudioTrack> get_nth_audio_track (uint32_t) const;
-
 	uint32_t nstripables (bool with_monitor = false) const;
 	uint32_t nroutes() const { return routes.reader()->size(); }
 	uint32_t ntracks () const;
diff --git a/libs/ardour/import_pt.cc b/libs/ardour/import_pt.cc
index 0316b475b8..a0a1dd8f0a 100644
--- a/libs/ardour/import_pt.cc
+++ b/libs/ardour/import_pt.cc
@@ -284,10 +284,7 @@ Session::import_pt_rest (PTFFormat& ptf)
 	SourceList just_one_src;
 
 	std::shared_ptr<AudioTrack> existing_track;
-	uint16_t i;
 	uint16_t nth = 0;
-	uint16_t ntr = 0;
-	uint16_t existing_ntracks = 0;
 	struct ptflookup utr;
 	vector<midipair> uniquetr;
 
@@ -339,37 +336,31 @@ Session::import_pt_rest (PTFFormat& ptf)
 		goto no_audio_tracks;
 	}
 
-	/* Get current number of ardour tracks */
-	existing_ntracks = naudiotracks ();
-
-	/* Create all PT tracks */
-	ntr = (ptf.tracks ().at (ptf.tracks ().size () - 1)).index + 1;
+	/* Create all PT tracks if not already present and freeze all playlists of tracks we will touch */
 	nth = -1;
 	for (vector<PTFFormat::track_t>::const_iterator a = ptf.tracks ().begin (); a != ptf.tracks ().end (); ++a) {
 		if (a->index != nth) {
 			nth++;
-			DEBUG_TRACE (DEBUG::FileUtils, string_compose ("\tcreate tr(%1) %2\n", nth, a->name.c_str()));
-			list<std::shared_ptr<AudioTrack> > at (new_audio_track (1, 2, 0, 1, a->name.c_str(), PresentationInfo::max_order, Normal));
-			if (at.empty ()) {
-				return;
+			if (!(existing_track = dynamic_pointer_cast<AudioTrack> (route_by_name (a->name)))) {
+				/* Create missing track */
+				DEBUG_TRACE (DEBUG::FileUtils, string_compose ("\tcreate tr(%1) %2\n", nth, a->name.c_str()));
+				list<std::shared_ptr<AudioTrack> > at (new_audio_track (1, 2, 0, 1, a->name.c_str(), PresentationInfo::max_order, Normal));
+				if (at.empty ()) {
+					return;
+				}
+				existing_track = at.back();
 			}
+			std::shared_ptr<Playlist> playlist = existing_track->playlist();
+
+			PlaylistState before;
+			before.playlist = playlist;
+			before.before = &playlist->get_state();
+			playlist->clear_changes ();
+			playlist->freeze ();
+			playlists.push_back(before);
 		}
 	}
 
-	/* Get all playlists of all tracks just created and Playlist::freeze() them */
-	assert (ntr == nth + 1);
-	for (i = 0; i < ntr; ++i) {
-		existing_track = get_nth_audio_track (i + existing_ntracks);
-		std::shared_ptr<Playlist> playlist = existing_track->playlist();
-
-		PlaylistState before;
-		before.playlist = playlist;
-		before.before = &playlist->get_state();
-		playlist->clear_changes ();
-		playlist->freeze ();
-		playlists.push_back(before);
-	}
-
 	/* Add regions */
 	for (vector<PTFFormat::track_t>::const_iterator a = ptf.tracks ().begin (); a != ptf.tracks ().end (); ++a) {
 		for (vector<struct ptflookup>::iterator p = ptfregpair.begin ();
@@ -381,8 +372,8 @@ Session::import_pt_rest (PTFFormat& ptf)
 				std::shared_ptr<Region> r = RegionFactory::region_by_id (p->id);
 				DEBUG_TRACE (DEBUG::FileUtils, string_compose ("\twav(%1) reg(%2) tr(%3)\n", a->reg.wave.filename.c_str (), a->reg.index, a->index));
 
-				/* Use track we created earlier */
-				existing_track = get_nth_audio_track (a->index + existing_ntracks);
+				/* Use audio track we know exists */
+				existing_track = dynamic_pointer_cast<AudioTrack> (route_by_name (a->name));
 				assert (existing_track);
 
 				/* Put on existing track */
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 1a37109af4..8a63e451ae 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -6403,24 +6403,6 @@ Session::route_removed_from_route_group (RouteGroup* rg, std::weak_ptr<Route> r)
 	}
 }
 
-std::shared_ptr<AudioTrack>
-Session::get_nth_audio_track (uint32_t nth) const
-{
-	RouteList rl (*(routes.reader ()));
-	rl.sort (Stripable::Sorter());
-
-	for (auto const& r: rl) {
-		std::shared_ptr<AudioTrack> at = std::dynamic_pointer_cast<AudioTrack> (r);
-		if (!at) {
-			continue;
-		}
-		if (nth-- == 0) {
-			return at;
-		}
-	}
-	return std::shared_ptr<AudioTrack> ();
-}
-
 std::shared_ptr<RouteList>
 Session::get_tracks () const
 {