diff --git a/libs/evoral/Sequence.cc b/libs/evoral/Sequence.cc
index 2ba0b0bb24..bbc7d5684a 100644
--- a/libs/evoral/Sequence.cc
+++ b/libs/evoral/Sequence.cc
@@ -1004,10 +1004,7 @@ Sequence<Time>::append_note_on_unlocked (const Event<Time>& ev, event_id_t evid)
 	assert (note->end_time() == std::numeric_limits<Temporal::Beats>::max());
 	note->set_id (evid);
 
-	add_note_unlocked (note);
-
-	DEBUG_TRACE (DEBUG::Sequence, string_compose ("Appending active note on %1 channel %2\n",
-	                                              (unsigned)(uint8_t)note->note(), note->channel()));
+	DEBUG_TRACE (DEBUG::Sequence, string_compose ("New nascent/active note on %1 channel [%2]\n\n", (int) note->note(), note->channel()));
 	_write_notes[note->channel()].insert (note);
 
 }
@@ -1047,21 +1044,32 @@ Sequence<Time>::append_note_off_unlocked (const Event<Time>& ev)
 		++tmp;
 
 		NotePtr nn = *n;
+
 		if (ev.note() == nn->note() && nn->channel() == ev.channel()) {
-			assert(ev.time() >= nn->time());
+			if (!resolved) {
+				assert(ev.time() >= nn->time());
 
-			nn->set_length (ev.time() - nn->time());
-			nn->set_off_velocity (ev.velocity());
+				nn->set_length (ev.time() - nn->time());
+				nn->set_off_velocity (ev.velocity());
 
-			_write_notes[ev.channel()].erase(n);
-			DEBUG_TRACE (DEBUG::Sequence, string_compose ("resolved note @ %2 length: %1\n", nn->length(), nn->time()));
-			resolved = true;
-			break;
+				add_note_unlocked (nn);
+
+				_write_notes[ev.channel()].erase(n);
+				DEBUG_TRACE (DEBUG::Sequence, string_compose ("resolved note @ %1\n", *nn));
+				resolved = true;
+			} else {
+				/* additional matching nascent notes ... just
+				   delete them.
+				*/
+				DEBUG_TRACE (DEBUG::Sequence, string_compose ("dropping additional nascent note @ %1\n", *nn));
+				_write_notes[ev.channel()].erase(n);
+			}
 		}
 
 		n = tmp;
 	}
 
+
 	if (!resolved) {
 		cerr << this << " spurious note off chan " << (int)ev.channel()
 		     << ", note " << (int)ev.note() << " @ " << ev.time() << endl;