diff --git a/src/engine/platform/ay.cpp b/src/engine/platform/ay.cpp
index f475b4750..cf52f3d29 100644
--- a/src/engine/platform/ay.cpp
+++ b/src/engine/platform/ay.cpp
@@ -115,8 +115,8 @@ void DivPlatformAY8910::acquire(short* bufL, short* bufR, size_t start, size_t l
     ay->sound_stream_update(ayBuf,len);
     if (stereo) {
       for (size_t i=0; i<len; i++) {
-        bufL[i+start]=ayBuf[0][i]+ayBuf[1][i];
-        bufR[i+start]=ayBuf[1][i]+ayBuf[2][i];
+        bufL[i+start]=ayBuf[0][i]+ayBuf[1][i]+((ayBuf[2][i]*stereoSep)>>8);
+        bufR[i+start]=((ayBuf[0][i]*stereoSep)>>8)+ayBuf[1][i]+ayBuf[2][i];
       }
     } else {
       for (size_t i=0; i<len; i++) {
@@ -659,6 +659,7 @@ void DivPlatformAY8910::setFlags(unsigned int flags) {
   ay->device_reset();
 
   stereo=(flags>>6)&1;
+  stereoSep=(flags>>8)&255;
 }
 
 int DivPlatformAY8910::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
diff --git a/src/engine/platform/ay.h b/src/engine/platform/ay.h
index 4b7ce1068..0537dadab 100644
--- a/src/engine/platform/ay.h
+++ b/src/engine/platform/ay.h
@@ -66,6 +66,7 @@ class DivPlatformAY8910: public DivDispatch {
     int dacPos;
     int dacSample;
     unsigned char sampleBank;
+    unsigned char stereoSep;
 
     int delay;
 
diff --git a/src/engine/platform/ay8930.cpp b/src/engine/platform/ay8930.cpp
index 123dc68ac..d5f01013d 100644
--- a/src/engine/platform/ay8930.cpp
+++ b/src/engine/platform/ay8930.cpp
@@ -99,8 +99,8 @@ void DivPlatformAY8930::acquire(short* bufL, short* bufR, size_t start, size_t l
   ay->sound_stream_update(ayBuf,len);
   if (stereo) {
     for (size_t i=0; i<len; i++) {
-      bufL[i+start]=ayBuf[0][i]+ayBuf[1][i];
-      bufR[i+start]=ayBuf[1][i]+ayBuf[2][i];
+      bufL[i+start]=ayBuf[0][i]+ayBuf[1][i]+((ayBuf[2][i]*stereoSep)>>8);
+      bufR[i+start]=((ayBuf[0][i]*stereoSep)>>8)+ayBuf[1][i]+ayBuf[2][i];
     }
   } else {
     for (size_t i=0; i<len; i++) {
@@ -609,6 +609,7 @@ void DivPlatformAY8930::setFlags(unsigned int flags) {
   }
 
   stereo=(flags>>6)&1;
+  stereoSep=(flags>>8)&255;
 }
 
 int DivPlatformAY8930::init(DivEngine* p, int channels, int sugRate, unsigned int flags) {
diff --git a/src/engine/platform/ay8930.h b/src/engine/platform/ay8930.h
index 81995f2de..75a5f6974 100644
--- a/src/engine/platform/ay8930.h
+++ b/src/engine/platform/ay8930.h
@@ -66,6 +66,7 @@ class DivPlatformAY8930: public DivDispatch {
     DivDispatchOscBuffer* oscBuf[3];
     unsigned char regPool[32];
     unsigned char ayNoiseAnd, ayNoiseOr;
+    unsigned char stereoSep;
     bool bank;
 
     int delay;
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 900845a69..98b600286 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -358,6 +358,14 @@ void FurnaceGUI::drawSysConf(int chan, DivSystem type, unsigned int& flags, bool
       if (ImGui::Checkbox("Stereo##_AY_STEREO",&stereo)) {
         copyOfFlags=(flags&(~0x40))|(stereo?0x40:0);
       }
+      if (stereo) {
+        int sep=256-((flags>>8)&255);
+        if (CWSliderInt("Separation",&sep,1,256)) {
+          if (sep<1) sep=1;
+          if (sep>256) sep=256;
+          copyOfFlags=(flags&(~0xff00))|((256-sep)<<8);
+        }
+      }
       ImGui::EndDisabled();
       bool clockSel=flags&0x80;
       ImGui::BeginDisabled((type==DIV_SYSTEM_AY8910) && ((flags&0x30)!=16));