From 55b76cf5a5c2930bb185caf427db464fee45579f Mon Sep 17 00:00:00 2001
From: Nils <nils@hilbricht.net>
Date: Thu, 8 Sep 2022 19:23:58 +0200
Subject: [PATCH] limit internal pitches to 0 to 127. They can be reached
 through the GUI and need protection logic

---
 engine/pattern.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/engine/pattern.py b/engine/pattern.py
index 3bb5621..c34152b 100644
--- a/engine/pattern.py
+++ b/engine/pattern.py
@@ -395,6 +395,10 @@ class Pattern(object):
 
             velocity = noteDict["velocity"]
             pitch = self._cachedTransposedScale[noteDict["pitch"] + scaleTransposition] + halftoneTransposition
+            if pitch > 127:
+                pitch = 127
+            elif pitch < 0:
+                pitch = 0
             exportPattern += cbox.Pattern.serialize_event(startTick, 0x90 + self.parentTrack.midiChannel, pitch, velocity) # note on
             exportPattern += cbox.Pattern.serialize_event(endTick-1, 0x80 + self.parentTrack.midiChannel, pitch, velocity) # note off  #-1 ticks to create a small logical gap. Does not affect next note on.