From cc8d737f8a68ace07b5590e36fb44b8d793a73ce Mon Sep 17 00:00:00 2001
From: "5684185+vsariola@users.noreply.github.com"
 <5684185+vsariola@users.noreply.github.com>
Date: Sun, 1 Feb 2026 13:02:42 +0200
Subject: [PATCH] change(tracker): midi controller value 64 maps to 64 in
 Sointu side

---
 tracker/midi.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tracker/midi.go b/tracker/midi.go
index 4d73ac3..23c6950 100644
--- a/tracker/midi.go
+++ b/tracker/midi.go
@@ -243,7 +243,10 @@ func (m *MIDIModel) handleControlEvent(e ControlChange) {
 	if err != nil {
 		return
 	}
-	newVal := (e.Value*(t.Max-t.Min)+63)/127 + t.Min
+	// +62 is chose so that the center position of a typical MIDI controller,
+	// which is 64, maps to 64 of a 0..128 range Sointu parameter. From there
+	// on, 65 maps to 66 and, importantly, 127 maps to 128.
+	newVal := (e.Value*(t.Max-t.Min)+62)/127 + t.Min
 	if m.d.Song.Patch[i].Units[u].Parameters[t.Param] == newVal {
 		return
 	}