diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6c05127c..0b3bfbae 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ defaults:
     shell: bash
 
 env:
-  BUILD_TYPE: Release
+  BUILD_TYPE: Debug
 
 jobs:
   build:
diff --git a/src/engine/engine.h b/src/engine/engine.h
index 7eb5c00c..41823b97 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -47,7 +47,7 @@
 #define BUSY_BEGIN_SOFT softLocked=true; isBusy.lock();
 #define BUSY_END isBusy.unlock(); softLocked=false;
 
-#define DIV_VERSION "0.6pre3"
+#define DIV_VERSION "Crash Evaluation Build"
 #define DIV_ENGINE_VERSION 133
 // for imports
 #define DIV_VERSION_MOD 0xff01
diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index 5d229b2c..16660720 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -346,6 +346,12 @@ void DivPlatformGenesis::tick(bool sysTick) {
       chan[i].freqChanged=true;
     }
 
+    if (i>=5 && chan[i].std.phaseReset.had) {
+      if (chan[i].std.phaseReset.val==1 && chan[i].furnaceDac) {
+        chan[i].dacPos=0;
+      }
+    }
+
     if (i>=6) continue;
 
     if (chan[i].std.phaseReset.had) {
diff --git a/src/engine/platform/segapcm.cpp b/src/engine/platform/segapcm.cpp
index 030e9ce0..a206de5c 100644
--- a/src/engine/platform/segapcm.cpp
+++ b/src/engine/platform/segapcm.cpp
@@ -133,9 +133,9 @@ void DivPlatformSegaPCM::tick(bool sysTick) {
       chan[i].freq=chan[i].baseFreq+(chan[i].pitch>>1)-64;
       if (!parent->song.oldArpStrategy) {
         if (chan[i].fixedArp) {
-          chan[i].freq=(chan[i].baseNoteOverride<<7)+(chan[i].pitch>>1)-64+chan[i].pitch2;
+          chan[i].freq=(chan[i].baseNoteOverride<<6)+(chan[i].pitch>>1)-64+chan[i].pitch2;
         } else {
-          chan[i].freq+=chan[i].arpOff<<7;
+          chan[i].freq+=chan[i].arpOff<<6;
         }
       }
       if (chan[i].furnacePCM) {
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 18304ae7..335da02a 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -1586,6 +1586,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
 
   // logic starts here
   for (int i=0; i<song.systemLen; i++) {
+    // TODO: we may have a problem here
     disCont[i].lastAvail=blip_samples_avail(disCont[i].bb[0]);
     if (disCont[i].lastAvail>0) {
       disCont[i].flush(disCont[i].lastAvail);
@@ -1685,6 +1686,10 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
   totalProcessed=size-(runLeftG>>MASTER_CLOCK_PREC);
 
   for (int i=0; i<song.systemLen; i++) {
+    if (size<disCont[i].lastAvail) {
+      logW("%d: size<lastAvail! %d<%d",i,size,disCont[i].lastAvail);
+      continue;
+    }
     disCont[i].fillBuf(disCont[i].runtotal,disCont[i].lastAvail,size-disCont[i].lastAvail);
   }