OPL: fix 4-op channel muting

2022-06-12 23:22:45 -05:00 · 2022-06-12 23:22:45 -05:00 · da756bef7f
parent f3f8804f47
commit da756bef7f
1 changed files with 3 additions and 0 deletions
--- a/src/engine/platform/opl.cpp
+++ b/src/engine/platform/opl.cpp
@ -677,6 +677,9 @@ void DivPlatformOPL::muteChannel(int ch, bool mute) {
    fm.channel[outChanMap[ch]].muted=mute;
  }
  int ops=(slots[3][ch]!=255 && chan[ch].state.ops==4 && oplType==3)?4:2;
+  if (ch&1 && ch<12) {
+    if (chan[ch-1].fourOp) return;
+  }
  chan[ch].fourOp=(ops==4);
  update4OpMask=true;
  for (int i=0; i<ops; i++) {