From 4dbacf0cb60b2fcb9b6ac5bef76fcdd4f91e438a Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 12 Sep 2025 10:31:55 -0600
Subject: [PATCH] do not alter visible note range of MidiView if data range did
 not change

---
 gtk2_ardour/midi_view.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index e91ad50e10..79680298cd 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -1163,9 +1163,12 @@ MidiView::model_changed()
 		low_note = _model->lowest_note ();
 		hi_note = _model->highest_note ();
 
+		uint8_t old_low = _midi_context.lowest_data_note ();
+		uint8_t old_high = _midi_context.highest_data_note ();
+
 		_midi_context.update_data_note_range (low_note, hi_note);
 
-		if (_midi_context.visibility_range_style() == MidiViewBackground::ContentsRange) {
+		if (((old_low != low_note) || (old_high != hi_note)) && _midi_context.visibility_range_style() == MidiViewBackground::ContentsRange) {
 			maybe_set_note_range (low_note, hi_note);
 		}
 	} else {