From 772aac580637226540e316ceffe6fc3a6cff649e Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Mon, 27 Dec 2021 16:47:37 -0500
Subject: [PATCH] fix crash when muting in ext ch mode

---
 src/engine/platform/genesisext.cpp | 2 +-
 src/engine/platform/ym2610ext.cpp  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/engine/platform/genesisext.cpp b/src/engine/platform/genesisext.cpp
index 2997b9caa..4343f8ae3 100644
--- a/src/engine/platform/genesisext.cpp
+++ b/src/engine/platform/genesisext.cpp
@@ -197,7 +197,7 @@ void DivPlatformGenesisExt::muteChannel(int ch, bool mute) {
   }
   isOpMuted[ch-2]=mute;
   
-  int ordch=orderedOps[ch];
+  int ordch=orderedOps[ch-2];
   DivInstrument* ins=parent->getIns(opChan[ch].ins);
   unsigned short baseAddr=chanOffs[2]|opOffs[ordch];
   DivInstrumentFM::Operator op=ins->fm.op[ordch];
diff --git a/src/engine/platform/ym2610ext.cpp b/src/engine/platform/ym2610ext.cpp
index 5a5e310a8..8a1802025 100644
--- a/src/engine/platform/ym2610ext.cpp
+++ b/src/engine/platform/ym2610ext.cpp
@@ -248,7 +248,7 @@ void DivPlatformYM2610Ext::muteChannel(int ch, bool mute) {
   }
   isOpMuted[ch-1]=mute;
   
-  int ordch=orderedOps[ch];
+  int ordch=orderedOps[ch-1];
   DivInstrument* ins=parent->getIns(opChan[ch].ins);
   unsigned short baseAddr=chanOffs[1]|opOffs[ordch];
   DivInstrumentFM::Operator op=ins->fm.op[ordch];