From c3886dd5a892e6963734cdafb99706fa393581ea Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sat, 21 Jun 2025 10:39:11 -0500
Subject: [PATCH] OPLL: fix pitch calculation

possibly issue #2538
---
 src/engine/platform/opll.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index f7687cc2a..b5cbc0f6c 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -390,6 +390,7 @@ int DivPlatformOPLL::toFreq(int freq, int fixedBlock) {
     block=freq/OPLL_C_NUM;
     if (block>0) block=bsr(block);
   }
+  if (block>7) block=7;
   freq>>=block;
   if (freq>0x1ff) freq=0x1ff;
   return (block<<9)|freq;