diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index 143a90fe..7dde9790 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -263,19 +263,37 @@ void DivPlatformGenesis::tick(bool sysTick) {
       }
     }
 
-    if (chan[i].std.arp.had) {
-      if (!chan[i].inPorta) {
-        if (chan[i].std.arp.mode) {
-          chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].std.arp.val,11);
-        } else {
-          chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].note+(signed char)chan[i].std.arp.val,11);
+    if (i>=5 && chan[i].furnaceDac) {
+      if (chan[i].std.arp.had) {
+        if (!chan[i].inPorta) {
+          if (chan[i].std.arp.mode) {
+            chan[i].baseFreq=parent->calcBaseFreq(1,1,chan[i].std.arp.val,false);
+          } else {
+            chan[i].baseFreq=parent->calcBaseFreq(1,1,chan[i].note+(signed char)chan[i].std.arp.val,false);
+          }
+        }
+        chan[i].freqChanged=true;
+      } else {
+        if (chan[i].std.arp.mode && chan[i].std.arp.finished) {
+          chan[i].baseFreq=parent->calcBaseFreq(1,1,chan[i].note,false);
+          chan[i].freqChanged=true;
         }
       }
-      chan[i].freqChanged=true;
     } else {
-      if (chan[i].std.arp.mode && chan[i].std.arp.finished) {
-        chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].note,11);
+       if (chan[i].std.arp.had) {
+        if (!chan[i].inPorta) {
+          if (chan[i].std.arp.mode) {
+            chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].std.arp.val,11);
+          } else {
+            chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].note+(signed char)chan[i].std.arp.val,11);
+          }
+        }
         chan[i].freqChanged=true;
+      } else {
+        if (chan[i].std.arp.mode && chan[i].std.arp.finished) {
+          chan[i].baseFreq=NOTE_FNUM_BLOCK(chan[i].note,11);
+          chan[i].freqChanged=true;
+        }
       }
     }