diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index 264f3a7a..a8b51b10 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -247,7 +247,7 @@ void DivPlatformOPLL::tick(bool sysTick) {
       if (chan[i].freq>65535) chan[i].freq=65535;
       int freqt=toFreq(chan[i].freq);
       chan[i].freqL=freqt&0xff;
-      if (i>=6 && properDrums) {
+      if (i>=6 && properDrums && (i<9 || !noTopHatFreq)) {
         immWrite(0x10+drumSlot[i],freqt&0xff);
         immWrite(0x20+drumSlot[i],freqt>>8);
       } else if (i<6 || !drums) {
@@ -963,6 +963,7 @@ void DivPlatformOPLL::setFlags(const DivConfig& flags) {
   for (int i=0; i<11; i++) {
     oscBuf[i]->rate=rate/2;
   }
+  noTopHatFreq=flags.getBool("noTopHatFreq",false);
 }
 
 int DivPlatformOPLL::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
diff --git a/src/engine/platform/opll.h b/src/engine/platform/opll.h
index 390d79a9..8dd8743d 100644
--- a/src/engine/platform/opll.h
+++ b/src/engine/platform/opll.h
@@ -82,7 +82,7 @@ class DivPlatformOPLL: public DivDispatch {
 
     bool useYMFM;
     bool drums;
-    bool properDrums, properDrumsSys;
+    bool properDrums, properDrumsSys, noTopHatFreq;
     bool vrc7;
 
     unsigned char patchSet;
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index f1b6822f..9ac674bc 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -318,6 +318,7 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
     case DIV_SYSTEM_VRC7: {
       int clockSel=flags.getInt("clockSel",0);
       int patchSet=flags.getInt("patchSet",0);
+      bool noTopHatFreq=flags.getBool("noTopHatFreq",false);
 
       ImGui::Text("Clock rate:");
       if (ImGui::RadioButton("NTSC (3.58MHz)",clockSel==0)) {
@@ -356,12 +357,19 @@ bool FurnaceGUI::drawSysConf(int chan, DivSystem type, DivConfig& flags, bool mo
         }
       }
 
+      if (type==DIV_SYSTEM_OPLL_DRUMS) {
+        if (ImGui::Checkbox("Ignore top/hi-hat frequency changes",&noTopHatFreq)) {
+          altered=true;
+        }
+      }
+
       if (altered) {
         e->lockSave([&]() {
           flags.set("clockSel",clockSel);
           if (type!=DIV_SYSTEM_VRC7) {
             flags.set("patchSet",patchSet);
           }
+          flags.set("noTopHatFreq",noTopHatFreq);
         });
       }
       break;