From 378ba6fe80ecb62f7eb24f14c2652e0cc9096f29 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sun, 11 Jan 2026 19:06:58 -0500
Subject: [PATCH] hide soft panning effects on hard panning chips

issue #2739
---
 .github/workflows/build.yml        | 2 +-
 src/engine/dispatch.h              | 6 ++++++
 src/engine/platform/abstract.cpp   | 4 ++++
 src/engine/platform/bifurcator.cpp | 4 ++++
 src/engine/platform/bifurcator.h   | 1 +
 src/engine/platform/c140.cpp       | 4 ++++
 src/engine/platform/c140.h         | 1 +
 src/engine/platform/dave.cpp       | 4 ++++
 src/engine/platform/dave.h         | 1 +
 src/engine/platform/es5506.cpp     | 4 ++++
 src/engine/platform/es5506.h       | 1 +
 src/engine/platform/gbaminmod.cpp  | 4 ++++
 src/engine/platform/gbaminmod.h    | 1 +
 src/engine/platform/k007232.cpp    | 4 ++++
 src/engine/platform/k007232.h      | 1 +
 src/engine/platform/k053260.cpp    | 4 ++++
 src/engine/platform/k053260.h      | 1 +
 src/engine/platform/lynx.cpp       | 4 ++++
 src/engine/platform/lynx.h         | 1 +
 src/engine/platform/multipcm.cpp   | 4 ++++
 src/engine/platform/multipcm.h     | 1 +
 src/engine/platform/namcowsg.cpp   | 4 ++++
 src/engine/platform/namcowsg.h     | 1 +
 src/engine/platform/nds.cpp        | 4 ++++
 src/engine/platform/nds.h          | 1 +
 src/engine/platform/opl.cpp        | 4 ++++
 src/engine/platform/opl.h          | 1 +
 src/engine/platform/pce.cpp        | 4 ++++
 src/engine/platform/pce.h          | 1 +
 src/engine/platform/pcmdac.cpp     | 4 ++++
 src/engine/platform/pcmdac.h       | 1 +
 src/engine/platform/powernoise.cpp | 4 ++++
 src/engine/platform/powernoise.h   | 1 +
 src/engine/platform/qsound.cpp     | 4 ++++
 src/engine/platform/qsound.h       | 1 +
 src/engine/platform/rf5c68.cpp     | 4 ++++
 src/engine/platform/rf5c68.h       | 1 +
 src/engine/platform/saa.cpp        | 4 ++++
 src/engine/platform/saa.h          | 1 +
 src/engine/platform/segapcm.cpp    | 4 ++++
 src/engine/platform/segapcm.h      | 1 +
 src/engine/platform/sid3.cpp       | 4 ++++
 src/engine/platform/sid3.h         | 1 +
 src/engine/platform/snes.cpp       | 4 ++++
 src/engine/platform/snes.h         | 1 +
 src/engine/platform/su.cpp         | 4 ++++
 src/engine/platform/su.h           | 1 +
 src/engine/platform/swan.cpp       | 4 ++++
 src/engine/platform/swan.h         | 1 +
 src/engine/platform/t6w28.cpp      | 4 ++++
 src/engine/platform/t6w28.h        | 1 +
 src/engine/platform/vb.cpp         | 4 ++++
 src/engine/platform/vb.h           | 1 +
 src/engine/platform/x1_010.cpp     | 4 ++++
 src/engine/platform/x1_010.h       | 1 +
 src/engine/platform/ymz280b.cpp    | 4 ++++
 src/engine/platform/ymz280b.h      | 1 +
 src/gui/effectList.cpp             | 5 +++++
 58 files changed, 151 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8092888d0..dc57589f7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,7 +11,7 @@ defaults:
     shell: bash
 
 env:
-  BUILD_TYPE: Debug
+  BUILD_TYPE: Release
 
 jobs:
   build:
diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 5c277bb35..eb3c37a82 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -830,6 +830,12 @@ class DivDispatch {
      */
     virtual bool isVolGlobal();
 
+    /**
+     * test whether a channel supports soft panning.
+     * @return truth.
+     */
+    virtual bool hasSoftPan(int ch);
+
     /**
      * map MIDI velocity (from 0 to 127) to chip volume.
      * @param ch the chip channel. -1 means N/A.
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index bb3b40030..6edb24d22 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -107,6 +107,10 @@ bool DivDispatch::isVolGlobal() {
   return false;
 }
 
+bool DivDispatch::hasSoftPan(int ch) {
+  return false;
+}
+
 int DivDispatch::mapVelocity(int ch, float vel) {
   const int volMax=MAX(1,dispatch(DivCommand(DIV_CMD_GET_VOLMAX,MAX(ch,0))));
   return round(vel*volMax);
diff --git a/src/engine/platform/bifurcator.cpp b/src/engine/platform/bifurcator.cpp
index f67f69f50..4d33ae454 100644
--- a/src/engine/platform/bifurcator.cpp
+++ b/src/engine/platform/bifurcator.cpp
@@ -326,6 +326,10 @@ int DivPlatformBifurcator::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformBifurcator::hasSoftPan(int ch) {
+  return true;
+}
+
 DivMacroInt* DivPlatformBifurcator::getChanMacroInt(int ch) {
   return &chan[ch].std;
 }
diff --git a/src/engine/platform/bifurcator.h b/src/engine/platform/bifurcator.h
index 4023b50da..bc3ac3832 100644
--- a/src/engine/platform/bifurcator.h
+++ b/src/engine/platform/bifurcator.h
@@ -62,6 +62,7 @@ class DivPlatformBifurcator: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     unsigned short getPan(int chan);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/c140.cpp b/src/engine/platform/c140.cpp
index f6ea8893a..4558260b7 100644
--- a/src/engine/platform/c140.cpp
+++ b/src/engine/platform/c140.cpp
@@ -535,6 +535,10 @@ int DivPlatformC140::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformC140::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformC140::notifyInsChange(int ins) {
   for (int i=0; i<totalChans; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/c140.h b/src/engine/platform/c140.h
index 1144491c0..ecd5865e7 100644
--- a/src/engine/platform/c140.h
+++ b/src/engine/platform/c140.h
@@ -99,6 +99,7 @@ class DivPlatformC140: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/dave.cpp b/src/engine/platform/dave.cpp
index 365f358b5..db7a109f8 100644
--- a/src/engine/platform/dave.cpp
+++ b/src/engine/platform/dave.cpp
@@ -589,6 +589,10 @@ int DivPlatformDave::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformDave::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformDave::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/dave.h b/src/engine/platform/dave.h
index e0b1f3700..37719b997 100644
--- a/src/engine/platform/dave.h
+++ b/src/engine/platform/dave.h
@@ -87,6 +87,7 @@ class DivPlatformDave: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/es5506.cpp b/src/engine/platform/es5506.cpp
index 6086b1d10..1be77517e 100644
--- a/src/engine/platform/es5506.cpp
+++ b/src/engine/platform/es5506.cpp
@@ -1355,6 +1355,10 @@ int DivPlatformES5506::getOutputCount() {
   return 12;
 }
 
+bool DivPlatformES5506::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformES5506::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/es5506.h b/src/engine/platform/es5506.h
index 1e038be7c..0e1e14963 100644
--- a/src/engine/platform/es5506.h
+++ b/src/engine/platform/es5506.h
@@ -307,6 +307,7 @@ class DivPlatformES5506: public DivDispatch, public es550x_intf {
     virtual void tick(bool sysTick=true) override;
     virtual void muteChannel(int ch, bool mute) override;
     virtual int getOutputCount() override;
+    virtual bool hasSoftPan(int ch) override;
     virtual bool keyOffAffectsArp(int ch) override;
     virtual void setFlags(const DivConfig& flags) override;
     virtual void notifyInsChange(int ins) override;
diff --git a/src/engine/platform/gbaminmod.cpp b/src/engine/platform/gbaminmod.cpp
index 75070ebb0..5b44f42bc 100644
--- a/src/engine/platform/gbaminmod.cpp
+++ b/src/engine/platform/gbaminmod.cpp
@@ -617,6 +617,10 @@ int DivPlatformGBAMinMod::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformGBAMinMod::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformGBAMinMod::notifyInsChange(int ins) {
   for (int i=0; i<16; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/gbaminmod.h b/src/engine/platform/gbaminmod.h
index 633796d9b..15bb050fe 100644
--- a/src/engine/platform/gbaminmod.h
+++ b/src/engine/platform/gbaminmod.h
@@ -106,6 +106,7 @@ class DivPlatformGBAMinMod: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/k007232.cpp b/src/engine/platform/k007232.cpp
index e67485214..1c31e29a2 100644
--- a/src/engine/platform/k007232.cpp
+++ b/src/engine/platform/k007232.cpp
@@ -493,6 +493,10 @@ int DivPlatformK007232::getOutputCount() {
   return stereo?2:1;
 }
 
+bool DivPlatformK007232::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformK007232::hasAcquireDirect() {
   return true;
 }
diff --git a/src/engine/platform/k007232.h b/src/engine/platform/k007232.h
index 6545fc034..b38fd031a 100644
--- a/src/engine/platform/k007232.h
+++ b/src/engine/platform/k007232.h
@@ -94,6 +94,7 @@ class DivPlatformK007232: public DivDispatch, public k007232_intf {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool hasAcquireDirect();
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/k053260.cpp b/src/engine/platform/k053260.cpp
index 6206aaac5..3fe9d738e 100644
--- a/src/engine/platform/k053260.cpp
+++ b/src/engine/platform/k053260.cpp
@@ -410,6 +410,10 @@ int DivPlatformK053260::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformK053260::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformK053260::notifyInsChange(int ins) {
   for (int i=0; i<4; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/k053260.h b/src/engine/platform/k053260.h
index 073ccda52..c49ce9bc1 100644
--- a/src/engine/platform/k053260.h
+++ b/src/engine/platform/k053260.h
@@ -74,6 +74,7 @@ class DivPlatformK053260: public DivDispatch, public k053260_intf {
     virtual void tick(bool sysTick=true) override;
     virtual void muteChannel(int ch, bool mute) override;
     virtual int getOutputCount() override;
+    virtual bool hasSoftPan(int ch) override;
     virtual void notifyInsChange(int ins) override;
     virtual void notifyWaveChange(int wave) override;
     virtual void notifyInsDeletion(void* ins) override;
diff --git a/src/engine/platform/lynx.cpp b/src/engine/platform/lynx.cpp
index d25a94107..23c44e486 100644
--- a/src/engine/platform/lynx.cpp
+++ b/src/engine/platform/lynx.cpp
@@ -487,6 +487,10 @@ int DivPlatformLynx::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformLynx::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformLynx::forceIns() {
   for (int i=0; i<4; i++) {
     if (chan[i].active) {
diff --git a/src/engine/platform/lynx.h b/src/engine/platform/lynx.h
index aacfd5bae..84ffb8015 100644
--- a/src/engine/platform/lynx.h
+++ b/src/engine/platform/lynx.h
@@ -96,6 +96,7 @@ class DivPlatformLynx: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     bool keyOffAffectsPorta(int ch);
     bool getLegacyAlwaysSetVolume();
diff --git a/src/engine/platform/multipcm.cpp b/src/engine/platform/multipcm.cpp
index 3a91d6c4b..3b0baa621 100644
--- a/src/engine/platform/multipcm.cpp
+++ b/src/engine/platform/multipcm.cpp
@@ -495,6 +495,10 @@ int DivPlatformMultiPCM::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformMultiPCM::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformMultiPCM::keyOffAffectsArp(int ch) {
   return false;
 }
diff --git a/src/engine/platform/multipcm.h b/src/engine/platform/multipcm.h
index 36fab35bd..953de14ec 100644
--- a/src/engine/platform/multipcm.h
+++ b/src/engine/platform/multipcm.h
@@ -114,6 +114,7 @@ class DivPlatformMultiPCM: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     bool keyOffAffectsPorta(int ch);
     bool getLegacyAlwaysSetVolume();
diff --git a/src/engine/platform/namcowsg.cpp b/src/engine/platform/namcowsg.cpp
index 95c2583dd..cd44384e9 100644
--- a/src/engine/platform/namcowsg.cpp
+++ b/src/engine/platform/namcowsg.cpp
@@ -523,6 +523,10 @@ int DivPlatformNamcoWSG::getOutputCount() {
   return (devType==30)?2:1;
 }
 
+bool DivPlatformNamcoWSG::hasSoftPan(int ch) {
+  return (devType==30);
+}
+
 bool DivPlatformNamcoWSG::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/namcowsg.h b/src/engine/platform/namcowsg.h
index 11646045a..29e9f5777 100644
--- a/src/engine/platform/namcowsg.h
+++ b/src/engine/platform/namcowsg.h
@@ -71,6 +71,7 @@ class DivPlatformNamcoWSG: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     void setDeviceType(int type);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/nds.cpp b/src/engine/platform/nds.cpp
index fa77f2296..de96e909b 100644
--- a/src/engine/platform/nds.cpp
+++ b/src/engine/platform/nds.cpp
@@ -508,6 +508,10 @@ int DivPlatformNDS::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformNDS::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformNDS::hasAcquireDirect() {
 #ifdef ORIG_NDS_CORE
   return false;
diff --git a/src/engine/platform/nds.h b/src/engine/platform/nds.h
index 71b2fa5c6..7d8b1a831 100644
--- a/src/engine/platform/nds.h
+++ b/src/engine/platform/nds.h
@@ -95,6 +95,7 @@ class DivPlatformNDS: public DivDispatch, public nds_sound_intf {
     virtual void muteChannel(int ch, bool mute) override;
     virtual float getPostAmp() override;
     virtual int getOutputCount() override;
+    virtual bool hasSoftPan(int ch) override;
     virtual bool hasAcquireDirect() override;
     virtual void notifyInsChange(int ins) override;
     virtual void notifyWaveChange(int wave) override;
diff --git a/src/engine/platform/opl.cpp b/src/engine/platform/opl.cpp
index ff8c69799..8dd37fdb7 100644
--- a/src/engine/platform/opl.cpp
+++ b/src/engine/platform/opl.cpp
@@ -2930,6 +2930,10 @@ int DivPlatformOPL::getOutputCount() {
   return totalOutputs;
 }
 
+bool DivPlatformOPL::hasSoftPan(int ch) {
+  return (chipType==4 && ch>=pcmChanOffs);
+}
+
 bool DivPlatformOPL::keyOffAffectsArp(int ch) {
   return false;
 }
diff --git a/src/engine/platform/opl.h b/src/engine/platform/opl.h
index b06b95962..676e7d4a9 100644
--- a/src/engine/platform/opl.h
+++ b/src/engine/platform/opl.h
@@ -203,6 +203,7 @@ class DivPlatformOPL: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void setCore(unsigned char which);
     void setOPLType(int type, bool drums);
     bool keyOffAffectsArp(int ch);
diff --git a/src/engine/platform/pce.cpp b/src/engine/platform/pce.cpp
index c410c3d09..66ac20fb1 100644
--- a/src/engine/platform/pce.cpp
+++ b/src/engine/platform/pce.cpp
@@ -610,6 +610,10 @@ int DivPlatformPCE::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformPCE::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformPCE::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/pce.h b/src/engine/platform/pce.h
index 07cf6a1b4..cbcae987f 100644
--- a/src/engine/platform/pce.h
+++ b/src/engine/platform/pce.h
@@ -95,6 +95,7 @@ class DivPlatformPCE: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     bool hasAcquireDirect();
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/pcmdac.cpp b/src/engine/platform/pcmdac.cpp
index 023cad6d7..17722851b 100644
--- a/src/engine/platform/pcmdac.cpp
+++ b/src/engine/platform/pcmdac.cpp
@@ -544,6 +544,10 @@ int DivPlatformPCMDAC::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformPCMDAC::hasSoftPan(int ch) {
+  return outStereo;
+}
+
 DivMacroInt* DivPlatformPCMDAC::getChanMacroInt(int ch) {
   if (ch>=chans) return NULL;
   return &chan[ch].std;
diff --git a/src/engine/platform/pcmdac.h b/src/engine/platform/pcmdac.h
index c6d22179e..59ec24e62 100644
--- a/src/engine/platform/pcmdac.h
+++ b/src/engine/platform/pcmdac.h
@@ -80,6 +80,7 @@ class DivPlatformPCMDAC: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     DivMacroInt* getChanMacroInt(int ch);
     unsigned short getPan(int chan);
     DivSamplePos getSamplePos(int ch);
diff --git a/src/engine/platform/powernoise.cpp b/src/engine/platform/powernoise.cpp
index 8051ed2ce..735462909 100644
--- a/src/engine/platform/powernoise.cpp
+++ b/src/engine/platform/powernoise.cpp
@@ -494,6 +494,10 @@ int DivPlatformPowerNoise::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformPowerNoise::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformPowerNoise::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/powernoise.h b/src/engine/platform/powernoise.h
index 867269af8..28a487830 100644
--- a/src/engine/platform/powernoise.h
+++ b/src/engine/platform/powernoise.h
@@ -94,6 +94,7 @@ class DivPlatformPowerNoise: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/qsound.cpp b/src/engine/platform/qsound.cpp
index 213de85f1..dd7969960 100644
--- a/src/engine/platform/qsound.cpp
+++ b/src/engine/platform/qsound.cpp
@@ -676,6 +676,10 @@ int DivPlatformQSound::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformQSound::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformQSound::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/qsound.h b/src/engine/platform/qsound.h
index d78d50560..111b21eb9 100644
--- a/src/engine/platform/qsound.h
+++ b/src/engine/platform/qsound.h
@@ -81,6 +81,7 @@ class DivPlatformQSound: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsChange(int ins);
diff --git a/src/engine/platform/rf5c68.cpp b/src/engine/platform/rf5c68.cpp
index 45a16255a..0142c83b8 100644
--- a/src/engine/platform/rf5c68.cpp
+++ b/src/engine/platform/rf5c68.cpp
@@ -357,6 +357,10 @@ int DivPlatformRF5C68::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformRF5C68::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformRF5C68::notifyInsChange(int ins) {
   for (int i=0; i<8; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/rf5c68.h b/src/engine/platform/rf5c68.h
index c2081d1fa..7c7348f97 100644
--- a/src/engine/platform/rf5c68.h
+++ b/src/engine/platform/rf5c68.h
@@ -69,6 +69,7 @@ class DivPlatformRF5C68: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void setChipModel(int type);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/engine/platform/saa.cpp b/src/engine/platform/saa.cpp
index 5283a5176..3adbcd21f 100644
--- a/src/engine/platform/saa.cpp
+++ b/src/engine/platform/saa.cpp
@@ -415,6 +415,10 @@ int DivPlatformSAA1099::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformSAA1099::hasSoftPan(int ch) {
+  return true;
+}
+
 int DivPlatformSAA1099::getPortaFloor(int ch) {
   return 12;
 }
diff --git a/src/engine/platform/saa.h b/src/engine/platform/saa.h
index 056e9a278..ee627083b 100644
--- a/src/engine/platform/saa.h
+++ b/src/engine/platform/saa.h
@@ -83,6 +83,7 @@ class DivPlatformSAA1099: public DivDispatch {
     void muteChannel(int ch, bool mute);
     void setFlags(const DivConfig& flags);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     int getPortaFloor(int ch);
     bool keyOffAffectsArp(int ch);
     bool getLegacyAlwaysSetVolume();
diff --git a/src/engine/platform/segapcm.cpp b/src/engine/platform/segapcm.cpp
index 877d76f4d..3599081f7 100644
--- a/src/engine/platform/segapcm.cpp
+++ b/src/engine/platform/segapcm.cpp
@@ -533,6 +533,10 @@ int DivPlatformSegaPCM::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformSegaPCM::hasSoftPan(int ch) {
+  return true;
+}
+
 int DivPlatformSegaPCM::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
   parent=p;
   dumpWrites=false;
diff --git a/src/engine/platform/segapcm.h b/src/engine/platform/segapcm.h
index e00fb0d74..2a6ea589e 100644
--- a/src/engine/platform/segapcm.h
+++ b/src/engine/platform/segapcm.h
@@ -104,6 +104,7 @@ class DivPlatformSegaPCM: public DivDispatch {
     void renderSamples(int chipID);
     void setFlags(const DivConfig& flags);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool getLegacyAlwaysSetVolume();
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
diff --git a/src/engine/platform/sid3.cpp b/src/engine/platform/sid3.cpp
index 9dd44849c..a33092dec 100644
--- a/src/engine/platform/sid3.cpp
+++ b/src/engine/platform/sid3.cpp
@@ -1332,6 +1332,10 @@ int DivPlatformSID3::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformSID3::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformSID3::getDCOffRequired()
 {
   return false;
diff --git a/src/engine/platform/sid3.h b/src/engine/platform/sid3.h
index f4acc43ec..2c30078d8 100644
--- a/src/engine/platform/sid3.h
+++ b/src/engine/platform/sid3.h
@@ -269,6 +269,7 @@ class DivPlatformSID3: public DivDispatch {
     const char** getRegisterSheet();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void getPaired(int ch, std::vector<DivChannelPair>& ret);
     void quit();
     ~DivPlatformSID3();
diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index be76b48b3..e2c30213b 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -919,6 +919,10 @@ int DivPlatformSNES::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformSNES::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformSNES::notifyInsChange(int ins) {
   for (int i=0; i<8; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/snes.h b/src/engine/platform/snes.h
index 306bf653d..1b3ed315c 100644
--- a/src/engine/platform/snes.h
+++ b/src/engine/platform/snes.h
@@ -117,6 +117,7 @@ class DivPlatformSNES: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/su.cpp b/src/engine/platform/su.cpp
index 5195dabbd..faa2e29af 100644
--- a/src/engine/platform/su.cpp
+++ b/src/engine/platform/su.cpp
@@ -634,6 +634,10 @@ int DivPlatformSoundUnit::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformSoundUnit::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformSoundUnit::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/su.h b/src/engine/platform/su.h
index 0ccfb4774..c04ca54fa 100644
--- a/src/engine/platform/su.h
+++ b/src/engine/platform/su.h
@@ -126,6 +126,7 @@ class DivPlatformSoundUnit: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     void setFlags(const DivConfig& flags);
     void notifyInsDeletion(void* ins);
diff --git a/src/engine/platform/swan.cpp b/src/engine/platform/swan.cpp
index 19ba44719..c6cd46afc 100644
--- a/src/engine/platform/swan.cpp
+++ b/src/engine/platform/swan.cpp
@@ -661,6 +661,10 @@ int DivPlatformSwan::getOutputCount() {
   return (stereo || useMdfn)?2:1;
 }
 
+bool DivPlatformSwan::hasSoftPan(int ch) {
+  return (stereo || useMdfn);
+}
+
 bool DivPlatformSwan::hasAcquireDirect() {
   return useMdfn;
 }
diff --git a/src/engine/platform/swan.h b/src/engine/platform/swan.h
index 64707d805..f676522c0 100644
--- a/src/engine/platform/swan.h
+++ b/src/engine/platform/swan.h
@@ -82,6 +82,7 @@ class DivPlatformSwan: public DivDispatch {
     void notifyWaveChange(int wave);
     void notifyInsDeletion(void* ins);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool hasAcquireDirect();
     void setUseMdfn(bool use);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/platform/t6w28.cpp b/src/engine/platform/t6w28.cpp
index 44276f82d..aa43d7253 100644
--- a/src/engine/platform/t6w28.cpp
+++ b/src/engine/platform/t6w28.cpp
@@ -358,6 +358,10 @@ int DivPlatformT6W28::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformT6W28::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformT6W28::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/t6w28.h b/src/engine/platform/t6w28.h
index dd8bbf9c6..accf7f36e 100644
--- a/src/engine/platform/t6w28.h
+++ b/src/engine/platform/t6w28.h
@@ -72,6 +72,7 @@ class DivPlatformT6W28: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     bool hasAcquireDirect();
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/vb.cpp b/src/engine/platform/vb.cpp
index a0be3efb5..dd705b07f 100644
--- a/src/engine/platform/vb.cpp
+++ b/src/engine/platform/vb.cpp
@@ -565,6 +565,10 @@ int DivPlatformVB::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformVB::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformVB::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/vb.h b/src/engine/platform/vb.h
index 1a95f39b5..ecc755ba9 100644
--- a/src/engine/platform/vb.h
+++ b/src/engine/platform/vb.h
@@ -90,6 +90,7 @@ class DivPlatformVB: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     bool hasAcquireDirect();
     float getPostAmp();
diff --git a/src/engine/platform/x1_010.cpp b/src/engine/platform/x1_010.cpp
index 1ca69e262..0c4e95912 100644
--- a/src/engine/platform/x1_010.cpp
+++ b/src/engine/platform/x1_010.cpp
@@ -890,6 +890,10 @@ int DivPlatformX1_010::getOutputCount() {
   return stereo?2:1;
 }
 
+bool DivPlatformX1_010::hasSoftPan(int ch) {
+  return true;
+}
+
 bool DivPlatformX1_010::keyOffAffectsArp(int ch) {
   return true;
 }
diff --git a/src/engine/platform/x1_010.h b/src/engine/platform/x1_010.h
index 721400914..258d526ea 100644
--- a/src/engine/platform/x1_010.h
+++ b/src/engine/platform/x1_010.h
@@ -141,6 +141,7 @@ class DivPlatformX1_010: public DivDispatch, public vgsound_emu_mem_intf {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     int getOutputCount();
+    bool hasSoftPan(int ch);
     bool keyOffAffectsArp(int ch);
     float getPostAmp();
     void setFlags(const DivConfig& flags);
diff --git a/src/engine/platform/ymz280b.cpp b/src/engine/platform/ymz280b.cpp
index 55350818a..5f3a5baf6 100644
--- a/src/engine/platform/ymz280b.cpp
+++ b/src/engine/platform/ymz280b.cpp
@@ -395,6 +395,10 @@ int DivPlatformYMZ280B::getOutputCount() {
   return 2;
 }
 
+bool DivPlatformYMZ280B::hasSoftPan(int ch) {
+  return true;
+}
+
 void DivPlatformYMZ280B::notifyInsChange(int ins) {
   for (int i=0; i<8; i++) {
     if (chan[i].ins==ins) {
diff --git a/src/engine/platform/ymz280b.h b/src/engine/platform/ymz280b.h
index cd7191b86..3485c43bc 100644
--- a/src/engine/platform/ymz280b.h
+++ b/src/engine/platform/ymz280b.h
@@ -70,6 +70,7 @@ class DivPlatformYMZ280B: public DivDispatch {
     void muteChannel(int ch, bool mute);
     float getPostAmp();
     int getOutputCount();
+    bool hasSoftPan(int ch);
     void setChipModel(int type);
     void notifyInsChange(int ins);
     void notifyWaveChange(int wave);
diff --git a/src/gui/effectList.cpp b/src/gui/effectList.cpp
index 284b8cb1a..4ce1c22d0 100644
--- a/src/gui/effectList.cpp
+++ b/src/gui/effectList.cpp
@@ -61,6 +61,11 @@ void FurnaceGUI::drawEffectList() {
             if (outputs<2) {
               continue;
             }
+            if (!dispatch->hasSoftPan(e->song.dispatchChanOfChan[cursor.xCoarse])) {
+              if (i==0x80) continue;
+              if (i==0x83) continue;
+              if (i==0x84) continue;
+            }
             if (outputs<3) {
               if (i>=0x88 && i<=0x8f) {
                 continue;