diff --git a/src/engine/platform/sound/su.cpp b/src/engine/platform/sound/su.cpp
index 6637bfa7d..a87205457 100644
--- a/src/engine/platform/sound/su.cpp
+++ b/src/engine/platform/sound/su.cpp
@@ -300,12 +300,46 @@ void SoundUnit::NextSample(short* l, short* r) {
     }
   }
 
-  *l=minval(32767,maxval(-32767,tnsL));
-  *r=minval(32767,maxval(-32767,tnsR));
+  if (dsOut) {
+    tnsL=minval(32767,maxval(-32767,tnsL<<1));
+    tnsR=minval(32767,maxval(-32767,tnsR<<1));
+
+    short accumL=0;
+    short accumR=0;
+
+    for (int i=0; i<4; i++) {
+      if ((tnsL>>8)==0 && dsCounterL>0) dsCounterL=0;
+      dsCounterL+=tnsL>>8;
+      if (dsCounterL>=0) {
+        accumL+=4095;
+        dsCounterL-=127;
+      } else {
+        accumL+=-4095;
+        dsCounterL+=127;
+      }
+
+      if ((tnsR>>8)==0 && dsCounterR>0) dsCounterR=0;
+      dsCounterR+=tnsR>>8;
+      if (dsCounterR>=0) {
+        accumR+=4095;
+        dsCounterR-=127;
+      } else {
+        accumR+=-4095;
+        dsCounterR+=127;
+      }
+    }
+
+    *l=accumL;
+    *r=accumR;
+  } else {
+    *l=minval(32767,maxval(-32767,tnsL));
+    *r=minval(32767,maxval(-32767,tnsR));
+  }
 }
 
-void SoundUnit::Init(int sampleMemSize) {
+void SoundUnit::Init(int sampleMemSize, bool dsOutMode) {
   pcmSize=sampleMemSize;
+  dsOut=dsOutMode;
   Reset();
   memset(pcm,0,pcmSize);
   for (int i=0; i<256; i++) {
@@ -346,6 +380,8 @@ void SoundUnit::Reset() {
     oldflags[i]=0;
     pcmdec[i]=0;
   }
+  dsCounterL=0;
+  dsCounterR=0;
   tnsL=0;
   tnsR=0;
   ilBufPos=0;
diff --git a/src/engine/platform/sound/su.h b/src/engine/platform/sound/su.h
index 0ee843481..546acfc9c 100644
--- a/src/engine/platform/sound/su.h
+++ b/src/engine/platform/sound/su.h
@@ -27,6 +27,8 @@ class SoundUnit {
   unsigned short oldfreq[8];
   unsigned short oldflags[8];
   unsigned int pcmSize;
+  bool dsOut;
+  short dsCounterL, dsCounterR;
   public:
     unsigned short resetfreq[8];
     unsigned short voldcycles[8];
@@ -99,7 +101,7 @@ class SoundUnit {
       if (ret>32767) ret=32767;
       return ret;
     }
-    void Init(int sampleMemSize=8192);
+    void Init(int sampleMemSize=8192, bool dsOutMode=false);
     void Reset();
     SoundUnit();
 };
diff --git a/src/engine/platform/su.cpp b/src/engine/platform/su.cpp
index 8cd6d3abc..afcdba242 100644
--- a/src/engine/platform/su.cpp
+++ b/src/engine/platform/su.cpp
@@ -596,7 +596,7 @@ void DivPlatformSoundUnit::setFlags(unsigned int flags) {
 
   sampleMemSize=flags&16;
 
-  su->Init(sampleMemSize?65536:8192);
+  su->Init(sampleMemSize?65536:8192,flags&32);
   renderSamples();
 }
 
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 484490348..a6bbcb921 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -135,13 +135,20 @@ void FurnaceGUI::drawSysConf(int chan, DivSystem type, unsigned int& flags, bool
       if (ImGui::RadioButton("5.95MHz (PAL)",(flags&3)==1)) {
         copyOfFlags=(flags&(~3))|1;
       }
-      ImGui::Text("Chip revision (sample memory):");
-      if (ImGui::RadioButton("A/B/E (8K)",(flags&16)==0)) {
+      ImGui::Text("Sample memory:");
+      if (ImGui::RadioButton("8K (rev A/B/E)",(flags&16)==0)) {
         copyOfFlags=(flags&(~16))|0;
       }
-      if (ImGui::RadioButton("D/F (64K)",(flags&16)==16)) {
+      if (ImGui::RadioButton("64K (rev D/F)",(flags&16)==16)) {
         copyOfFlags=(flags&(~16))|16;
       }
+      ImGui::Text("DAC resolution");
+      if (ImGui::RadioButton("16-bit (rev A/B/D/F)",(flags&32)==0)) {
+        copyOfFlags=(flags&(~32))|0;
+      }
+      if (ImGui::RadioButton("1-bit PDM (rev C/E)",(flags&32)==32)) {
+        copyOfFlags=(flags&(~32))|32;
+      }
       bool echo=flags&4;
       if (ImGui::Checkbox("Enable echo",&echo)) {
         copyOfFlags=(flags&(~4))|(echo<<2);