diff --git a/src/engine/platform/arcade.cpp b/src/engine/platform/arcade.cpp
index 15a25517..1af99eb7 100644
--- a/src/engine/platform/arcade.cpp
+++ b/src/engine/platform/arcade.cpp
@@ -495,8 +495,8 @@ int DivPlatformArcade::dispatch(DivCommand c) {
       chan[c.chan].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      chan[c.chan].chVolL=((c.value>>4)==1);
-      chan[c.chan].chVolR=((c.value&15)==1);
+      chan[c.chan].chVolL=((c.value>>4)>0);
+      chan[c.chan].chVolR=((c.value&15)>0);
       if (isMuted[c.chan]) {
         rWrite(chanOffs[c.chan]+ADDR_LR_FB_ALG,(chan[c.chan].state.alg&7)|(chan[c.chan].state.fb<<3));
       } else {
diff --git a/src/engine/platform/gb.cpp b/src/engine/platform/gb.cpp
index f02ea197..a2b53ef7 100644
--- a/src/engine/platform/gb.cpp
+++ b/src/engine/platform/gb.cpp
@@ -340,6 +340,7 @@ int DivPlatformGB::dispatch(DivCommand c) {
     case DIV_CMD_PANNING: {
       lastPan&=~(0x11<<c.chan);
       if (c.value==0) c.value=0x11;
+      c.value=((c.value&15)>0)|(((c.value>>4)>0)<<4)
       lastPan|=c.value<<c.chan;
       rWrite(0x25,procMute());
       break;
diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index 367bace6..16c44ae5 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -590,16 +590,10 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
       chan[c.chan].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          chan[c.chan].pan=1;
-          break;
-        case 0x10:
-          chan[c.chan].pan=2;
-          break;
-        default:
-          chan[c.chan].pan=3;
-          break;
+      if (c.value==0) {
+        chan[c.chan].pan=3;
+      } else {
+        chan[c.chan].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       rWrite(chanOffs[c.chan]+ADDR_LRAF,(isMuted[c.chan]?0:(chan[c.chan].pan<<6))|(chan[c.chan].state.fms&7)|((chan[c.chan].state.ams&3)<<4));
       break;
diff --git a/src/engine/platform/genesisext.cpp b/src/engine/platform/genesisext.cpp
index 364505db..02305a9a 100644
--- a/src/engine/platform/genesisext.cpp
+++ b/src/engine/platform/genesisext.cpp
@@ -106,16 +106,10 @@ int DivPlatformGenesisExt::dispatch(DivCommand c) {
       opChan[ch].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          opChan[ch].pan=1;
-          break;
-        case 0x10:
-          opChan[ch].pan=2;
-          break;
-        default:
-          opChan[ch].pan=3;
-          break;
+      if (c.value==0) {
+        opChan[ch].pan=3;
+      } else {
+        opChan[ch].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       // TODO: ???
       rWrite(chanOffs[2]+0xb4,(opChan[ch].pan<<6)|(chan[2].state.fms&7)|((chan[2].state.ams&3)<<4));
@@ -378,4 +372,4 @@ void DivPlatformGenesisExt::quit() {
 }
 
 DivPlatformGenesisExt::~DivPlatformGenesisExt() {
-}
\ No newline at end of file
+}
diff --git a/src/engine/platform/ym2610.cpp b/src/engine/platform/ym2610.cpp
index dd2447da..1bd460fa 100644
--- a/src/engine/platform/ym2610.cpp
+++ b/src/engine/platform/ym2610.cpp
@@ -892,16 +892,10 @@ int DivPlatformYM2610::dispatch(DivCommand c) {
       chan[c.chan].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          chan[c.chan].pan=1;
-          break;
-        case 0x10:
-          chan[c.chan].pan=2;
-          break;
-        default:
-          chan[c.chan].pan=3;
-          break;
+      if (c.value==0) {
+        chan[c.chan].pan=3;
+      } else {
+        chan[c.chan].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       if (c.chan>12) {
         immWrite(0x11,isMuted[c.chan]?0:(chan[c.chan].pan<<6));
diff --git a/src/engine/platform/ym2610b.cpp b/src/engine/platform/ym2610b.cpp
index 27bb2afb..a6bcf9ac 100644
--- a/src/engine/platform/ym2610b.cpp
+++ b/src/engine/platform/ym2610b.cpp
@@ -955,16 +955,10 @@ int DivPlatformYM2610B::dispatch(DivCommand c) {
       chan[c.chan].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          chan[c.chan].pan=1;
-          break;
-        case 0x10:
-          chan[c.chan].pan=2;
-          break;
-        default:
-          chan[c.chan].pan=3;
-          break;
+      if (c.value==0) {
+        chan[c.chan].pan=3;
+      } else {
+        chan[c.chan].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       if (c.chan>14) {
         immWrite(0x11,isMuted[c.chan]?0:(chan[c.chan].pan<<6));
diff --git a/src/engine/platform/ym2610bext.cpp b/src/engine/platform/ym2610bext.cpp
index f48fe19a..5b3c3872 100644
--- a/src/engine/platform/ym2610bext.cpp
+++ b/src/engine/platform/ym2610bext.cpp
@@ -97,16 +97,10 @@ int DivPlatformYM2610BExt::dispatch(DivCommand c) {
       opChan[ch].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          opChan[ch].pan=1;
-          break;
-        case 0x10:
-          opChan[ch].pan=2;
-          break;
-        default:
-          opChan[ch].pan=3;
-          break;
+      if (c.value==0) {
+        opChan[ch].pan=3;
+      } else {
+        opChan[ch].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       DivInstrument* ins=parent->getIns(opChan[ch].ins);
       // TODO: ???
@@ -334,4 +328,4 @@ void DivPlatformYM2610BExt::quit() {
 }
 
 DivPlatformYM2610BExt::~DivPlatformYM2610BExt() {
-}
\ No newline at end of file
+}
diff --git a/src/engine/platform/ym2610ext.cpp b/src/engine/platform/ym2610ext.cpp
index aff4bbf3..5e633eb2 100644
--- a/src/engine/platform/ym2610ext.cpp
+++ b/src/engine/platform/ym2610ext.cpp
@@ -97,16 +97,10 @@ int DivPlatformYM2610Ext::dispatch(DivCommand c) {
       opChan[ch].ins=c.value;
       break;
     case DIV_CMD_PANNING: {
-      switch (c.value) {
-        case 0x01:
-          opChan[ch].pan=1;
-          break;
-        case 0x10:
-          opChan[ch].pan=2;
-          break;
-        default:
-          opChan[ch].pan=3;
-          break;
+      if (c.value==0) {
+        opChan[ch].pan=3;
+      } else {
+        opChan[ch].pan=((c.value&15)>0)|(((c.value>>4)>0)<<1);
       }
       DivInstrument* ins=parent->getIns(opChan[ch].ins);
       // TODO: ???
@@ -334,4 +328,4 @@ void DivPlatformYM2610Ext::quit() {
 }
 
 DivPlatformYM2610Ext::~DivPlatformYM2610Ext() {
-}
\ No newline at end of file
+}