diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index e1d04dba..1e44fca4 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -939,6 +939,9 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
           } else {
             ins->std.dutyMacro[j]=reader.readI();
           }
+          if ((ds.system[0]==DIV_SYSTEM_C64_8580 || ds.system[0]==DIV_SYSTEM_C64_6581) && ins->std.dutyMacro[j]>24) {
+            ins->std.dutyMacro[j]=24;
+          }
         }
         if (ins->std.dutyMacroLen>0) {
           ins->std.dutyMacroLoop=reader.readC();
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 10af7599..7fb3ea41 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -868,7 +868,6 @@ bool DivEngine::nextTick(bool noAccum) {
             dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
             break;
         }
-        
       }
       if ((chan[i].keyOn || chan[i].keyOff) && chan[i].portaSpeed>0) {
         if (dispatchCmd(DivCommand(DIV_CMD_NOTE_PORTA,i,chan[i].portaSpeed,chan[i].portaNote))==2 && chan[i].portaStop) {
@@ -882,7 +881,7 @@ bool DivEngine::nextTick(bool noAccum) {
       if (chan[i].cut>0) {
         if (--chan[i].cut<1) {
           chan[i].oldNote=chan[i].note;
-          chan[i].note=-1;
+          //chan[i].note=-1;
           if (chan[i].inPorta) {
             chan[i].keyOff=true;
             chan[i].keyOn=false;