From 17cf657f6acb3aa323c6267def47cec0bb6cacfd Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Mon, 25 Apr 2022 11:52:05 -0500
Subject: [PATCH] one more pitch calc fix

---
 src/engine/engine.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 3bfcb54c..c56eff9c 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -894,7 +894,12 @@ unsigned short DivEngine::calcBaseFreqFNumBlock(double clock, double divider, in
   if (block>7) block=7;
   bf>>=block;
   if (bf<0) bf=0;
-  if (bf>1288) { // apparently octave boundary
+  // octave boundaries
+  while (bf>0 && bf<644 && block>0) {
+    bf<<=1;
+    block--;
+  }
+  if (bf>1288) {
     while (block<7) {
       bf>>=1;
       block++;