diff --git a/src/engine/platform/pce.cpp b/src/engine/platform/pce.cpp
index e5c25db38..1afe9014f 100644
--- a/src/engine/platform/pce.cpp
+++ b/src/engine/platform/pce.cpp
@@ -55,9 +55,9 @@ void DivPlatformPCE::tick() {
     if (chan[i].std.hadArp) {
       if (!chan[i].inPorta) {
         if (chan[i].std.arpMode) {
-          chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].std.arp+24)/12.0f)));
+          chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].std.arp)/12.0f)));
           // noise
-          chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[(chan[i].std.arp+24)%12]):0);
+          chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[(chan[i].std.arp)%12]):0);
         } else {
           chan[i].baseFreq=round(FREQ_BASE/pow(2.0f,((float)(chan[i].note+chan[i].std.arp-12)/12.0f)));
           chWrite(i,0x07,chan[i].noise?(0x80|noiseFreq[(chan[i].note+chan[i].std.arp-12)%12]):0);
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 4f1f7913b..5c01f9dbe 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -284,6 +284,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
         if (effectVal==0) {
           chan[i].portaNote=-1;
           chan[i].portaSpeed=-1;
+          dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i,false));
         } else {
           chan[i].portaNote=chan[i].note;
           chan[i].portaSpeed=effectVal;