diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index 537df42d7..0fd3b6d3d 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -390,6 +390,19 @@ int DivPlatformOPLL::toFreq(int freq) {
 
 void DivPlatformOPLL::muteChannel(int ch, bool mute) {
   isMuted[ch]=mute;
+  if (selCore==1) {
+    OPLL_setMask(fm_emu,
+      (isMuted[0]?1:0)|
+      (isMuted[1]?2:0)|
+      (isMuted[2]?4:0)|
+      (isMuted[3]?8:0)|
+      (isMuted[4]?16:0)|
+      (isMuted[5]?32:0)|
+      (isMuted[6]?64:0)|
+      (isMuted[7]?128:0)|
+      (isMuted[8]?256:0)
+    );
+  }
 }
 
 void DivPlatformOPLL::commitState(int ch, DivInstrument* ins) {
@@ -1043,6 +1056,17 @@ void DivPlatformOPLL::reset() {
     OPLL_reset(fm_emu);
     OPLL_setChipType(fm_emu,vrc7?1:0);
     OPLL_resetPatch(fm_emu,vrc7?1:nukedToEmuPatch[patchSet&3]);
+    OPLL_setMask(fm_emu,
+      (isMuted[0]?1:0)|
+      (isMuted[1]?2:0)|
+      (isMuted[2]?4:0)|
+      (isMuted[3]?8:0)|
+      (isMuted[4]?16:0)|
+      (isMuted[5]?32:0)|
+      (isMuted[6]?64:0)|
+      (isMuted[7]?128:0)|
+      (isMuted[8]?256:0)
+    );
   }
   for (int i=0; i<11; i++) {
     chan[i]=DivPlatformOPLL::Channel();