diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 758fcb2fa..4c85ca138 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -279,6 +279,9 @@ enum DivDispatchCmds {
   DIV_CMD_SID3_FILTER_MATRIX,
   DIV_CMD_SID3_FILTER_ENABLE,
 
+  DIV_CMD_C64_PW_SLIDE,
+  DIV_CMD_C64_CUTOFF_SLIDE,
+
   DIV_CMD_MAX
 };
 
diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index 04893e379..c394b2645 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -158,6 +158,24 @@ void DivPlatformC64::tick(bool sysTick) {
     int i=chanOrder[_i];
 
     chan[i].std.next();
+
+    if(sysTick)
+    {
+      if(chan[i].pw_slide != 0)
+      {
+        chan[i].duty -= chan[i].pw_slide;
+        chan[i].duty = CLAMP(chan[i].duty, 0, 0xfff);
+        rWrite(i*7+2,chan[i].duty&0xff);
+        rWrite(i*7+3,(chan[i].duty>>8) | (chan[i].outVol << 4));
+      }
+      if(cutoff_slide != 0)
+      {
+        filtCut += cutoff_slide;
+        filtCut = CLAMP(filtCut, 0, 0x7ff);
+        updateFilter();
+      }
+    }
+
     if (chan[i].std.vol.had) {
       vol=MIN(15,chan[i].std.vol.val);
       willUpdateFilter=true;
@@ -535,6 +553,12 @@ int DivPlatformC64::dispatch(DivCommand c) {
       chan[c.chan].release=c.value&15;
       rWrite(c.chan*7+6,(chan[c.chan].sustain<<4)|(chan[c.chan].release));
       break;
+    case DIV_CMD_C64_PW_SLIDE:
+      chan[c.chan].pw_slide = c.value * c.value2;
+      break;
+    case DIV_CMD_C64_CUTOFF_SLIDE:
+      cutoff_slide = c.value * c.value2;
+      break;
     case DIV_CMD_MACRO_OFF:
       chan[c.chan].std.mask(c.value,true);
       break;
@@ -653,8 +677,11 @@ void DivPlatformC64::reset() {
     chan[i].std.setEngine(parent);
     fakeLow[i]=0;
     fakeBand[i]=0;
+    chan[i].pw_slide = 0;
   }
 
+  cutoff_slide = 0;
+
   if (sidCore==2) {
     dSID_init(sid_d,chipClock,rate,sidIs6581?6581:8580,needInitTables);
     dSID_setMuteMask(
diff --git a/src/engine/platform/c64.h b/src/engine/platform/c64.h
index bd2e9d65e..cbc99ebc5 100644
--- a/src/engine/platform/c64.h
+++ b/src/engine/platform/c64.h
@@ -37,6 +37,7 @@ class DivPlatformC64: public DivDispatch {
     short duty;
     bool sweepChanged, filter;
     bool resetMask, resetFilter, resetDuty, gate, ring, sync, test;
+    short pw_slide;
     Channel():
       SharedChannel<signed char>(15),
       prevFreq(65535),
@@ -56,7 +57,8 @@ class DivPlatformC64: public DivDispatch {
       gate(true),
       ring(false),
       sync(false),
-      test(false) {}
+      test(false),
+      pw_slide(0) {}
   };
   Channel chan[3];
   DivDispatchOscBuffer* oscBuf[3];
@@ -76,6 +78,7 @@ class DivPlatformC64: public DivDispatch {
   unsigned char writeOscBuf;
   unsigned char sidCore;
   int filtCut, resetTime, initResetTime;
+  short cutoff_slide;
 
   bool keyPriority, sidIs6581, needInitTables, no1EUpdate, multiplyRel, macroRace;
   unsigned char chanOrder[3];
diff --git a/src/engine/platform/sid2.cpp b/src/engine/platform/sid2.cpp
index 90b0edc06..274dc7f3b 100644
--- a/src/engine/platform/sid2.cpp
+++ b/src/engine/platform/sid2.cpp
@@ -113,6 +113,24 @@ void DivPlatformSID2::tick(bool sysTick) {
     bool willUpdateFilter = false;
 
     chan[i].std.next();
+
+    if(sysTick)
+    {
+      if(chan[i].pw_slide != 0)
+      {
+        chan[i].duty -= chan[i].pw_slide;
+        chan[i].duty = CLAMP(chan[i].duty, 0, 0xfff);
+        rWrite(i*7+2,chan[i].duty&0xff);
+        rWrite(i*7+3,(chan[i].duty>>8) | (chan[i].outVol << 4));
+      }
+      if(chan[i].cutoff_slide != 0)
+      {
+        chan[i].filtCut += chan[i].cutoff_slide;
+        chan[i].filtCut = CLAMP(chan[i].filtCut, 0, 0xfff);
+        updateFilter(i);
+      }
+    }
+
     if (chan[i].std.vol.had) {
       chan[i].outVol=VOL_SCALE_LINEAR(chan[i].vol&15,MIN(15,chan[i].std.vol.val),15);
       rWrite(i*7+3,(chan[i].duty>>8) | (chan[i].outVol << 4));
@@ -521,6 +539,12 @@ int DivPlatformSID2::dispatch(DivCommand c) {
           break;
       }
       break;
+    case DIV_CMD_C64_PW_SLIDE:
+      chan[c.chan].pw_slide = c.value * c.value2;
+      break;
+    case DIV_CMD_C64_CUTOFF_SLIDE:
+      chan[c.chan].cutoff_slide = c.value * c.value2;
+      break;
     case DIV_CMD_MACRO_OFF:
       chan[c.chan].std.mask(c.value,true);
       break;
@@ -633,6 +657,9 @@ void DivPlatformSID2::reset() {
     chan[i].noise_mode = 0;
 
     rWrite(0x3 + 7 * i,0xf0);
+
+    chan[i].cutoff_slide = 0;
+    chan[i].pw_slide = 0;
   }
 
   sid2->reset();
diff --git a/src/engine/platform/sid2.h b/src/engine/platform/sid2.h
index f1dc71f3f..e44848f11 100644
--- a/src/engine/platform/sid2.h
+++ b/src/engine/platform/sid2.h
@@ -36,7 +36,8 @@ class DivPlatformSID2: public DivDispatch {
     unsigned char noise_mode;
     unsigned char mix_mode;
     int filtCut;
-    bool do_pw_sweep_writes, do_cutoff_sweep_writes;
+    short cutoff_slide;
+    short pw_slide;
     Channel():
       SharedChannel<signed char>(15),
       prevFreq(0x1ffff),
@@ -60,8 +61,8 @@ class DivPlatformSID2: public DivDispatch {
       noise_mode(0),
       mix_mode(0),
       filtCut(0),
-      do_pw_sweep_writes(false),
-      do_cutoff_sweep_writes(false) {}
+      cutoff_slide(0),
+      pw_slide(0) {}
   };
   Channel chan[3];
   DivDispatchOscBuffer* oscBuf[3];
diff --git a/src/engine/platform/sid3.cpp b/src/engine/platform/sid3.cpp
index 7e494c288..e18d977b0 100644
--- a/src/engine/platform/sid3.cpp
+++ b/src/engine/platform/sid3.cpp
@@ -276,6 +276,25 @@ void DivPlatformSID3::tick(bool sysTick)
   {
     chan[i].std.next();
 
+    if(sysTick)
+    {
+      if(chan[i].pw_slide != 0)
+      {
+        chan[i].duty -= chan[i].pw_slide;
+        chan[i].duty = CLAMP(chan[i].duty, 0, 0xffff);
+        updateDuty(i);
+      }
+      for(int j = 0; j < SID3_NUM_FILTERS; j++) //filters' slides
+      {
+        if(chan[i].filt[j].cutoff_slide != 0)
+        {
+          chan[i].filt[j].cutoff += chan[i].filt[j].cutoff_slide;
+          chan[i].filt[j].cutoff = CLAMP(chan[i].filt[j].cutoff, 0, 0xffff);
+          updateFilter(i, j);
+        }
+      }
+    }
+
     bool panChanged = false;
     bool flagsChanged = false;
     bool envChanged = false;
@@ -644,6 +663,7 @@ int DivPlatformSID3::dispatch(DivCommand c) {
 
   bool updEnv = false;
   DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_SID3);
+  int filter = 0;
 
   switch (c.cmd) {
     case DIV_CMD_NOTE_ON: {
@@ -999,6 +1019,13 @@ int DivPlatformSID3::dispatch(DivCommand c) {
       chan[c.chan].filt[(c.value >> 4) & 3].enabled = c.value & 1;
       updateFilter(c.chan, (c.value >> 4) & 3);
       break;
+    case DIV_CMD_C64_PW_SLIDE:
+      chan[c.chan].pw_slide = c.value * c.value2 * 16;
+      break;
+    case DIV_CMD_C64_CUTOFF_SLIDE:
+      filter = abs(c.value2) - 1;
+      chan[c.chan].filt[filter].cutoff_slide = c.value * (c.value2 > 0 ? 1 : -1) * 16;
+      break;
     case DIV_CMD_SAMPLE_POS:
       chan[c.chan].dacPos=c.value;
       break;
@@ -1108,6 +1135,8 @@ void DivPlatformSID3::reset() {
     {
       chan[i].filt[j].enabled = false;
       updateFilter(i, j);
+
+      chan[i].filt[j].cutoff_slide = 0;
     }
 
     chan[i].panLeft = chan[i].panRight = 0xff;
@@ -1116,6 +1145,8 @@ void DivPlatformSID3::reset() {
     updatePanning(i);
 
     chan[i].noiseLFSRMask = (1 << 29) | (1 << 5) | (1 << 3) | 1; //https://docs.amd.com/v/u/en-US/xapp052 for 30 bits: 30, 6, 4, 1
+
+    chan[i].pw_slide = 0;
   }
 
   sampleTick = 0;
diff --git a/src/engine/platform/sid3.h b/src/engine/platform/sid3.h
index 402a1c636..7216a5db0 100644
--- a/src/engine/platform/sid3.h
+++ b/src/engine/platform/sid3.h
@@ -29,7 +29,7 @@ class DivPlatformSID3: public DivDispatch {
   struct Channel: public SharedChannel<signed short> {
     int prevFreq;
     unsigned char wave, special_wave, attack, decay, sustain, sr, release;
-    unsigned short duty;
+    int duty;
     bool resetMask, resetFilter, resetDuty, gate, ring, sync, phase, oneBitNoise;
     bool phaseReset, envReset, phaseResetNoise;
     bool noiseFreqChanged;
@@ -44,7 +44,7 @@ class DivPlatformSID3: public DivDispatch {
 
     struct Filter 
     {
-      unsigned short cutoff;
+      int cutoff;
       unsigned char resonance;
       unsigned char output_volume;
       unsigned char distortion_level;
@@ -52,6 +52,8 @@ class DivPlatformSID3: public DivDispatch {
       bool enabled;
       unsigned char filter_matrix;
 
+      short cutoff_slide;
+
       Filter():
         cutoff(0),
         resonance(0),
@@ -59,7 +61,8 @@ class DivPlatformSID3: public DivDispatch {
         distortion_level(0),
         mode(0),
         enabled(false),
-        filter_matrix(0) {}
+        filter_matrix(0),
+        cutoff_slide(0) {}
     } filt[SID3_NUM_FILTERS];
 
     int noise_baseNoteOverride;
@@ -79,6 +82,8 @@ class DivPlatformSID3: public DivDispatch {
     unsigned char phaseInv;
     unsigned char feedback;
 
+    short pw_slide;
+
     void handleArpNoise(int offset=0) 
     {
       DivMacroStruct& m = this->std.op[3].am;
@@ -176,7 +181,8 @@ class DivPlatformSID3: public DivDispatch {
       dacPos(0),
       dacSample(-1),
       phaseInv(0),
-      feedback(0) {}
+      feedback(0),
+      pw_slide(0) {}
   };
   Channel chan[SID3_NUM_CHANNELS];
   DivDispatchOscBuffer* oscBuf[SID3_NUM_CHANNELS];
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 1455ff83c..62ea44820 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -278,6 +278,9 @@ const char* cmdName[]={
   "SID3_FILTER_CONNECTION",
   "SID3_FILTER_MATRIX",
   "SID3_FILTER_ENABLE",
+
+  "DIV_CMD_C64_PW_SLIDE",
+  "DIV_CMD_C64_CUTOFF_SLIDE",
 };
 
 static_assert((sizeof(cmdName)/sizeof(void*))==DIV_CMD_MAX,"update cmdName!");
diff --git a/src/engine/sysDef.cpp b/src/engine/sysDef.cpp
index efac5408f..b16cbb31b 100644
--- a/src/engine/sysDef.cpp
+++ b/src/engine/sysDef.cpp
@@ -612,6 +612,12 @@ void DivEngine::registerSystems() {
     {0x1e, {DIV_CMD_C64_EXTENDED, _("1Exy: Change other parameters (LEGACY)")}},
     {0x20, {DIV_CMD_C64_AD, _("20xy: Set attack/decay (x: attack; y: decay)")}},
     {0x21, {DIV_CMD_C64_SR, _("21xy: Set sustain/release (x: sustain; y: release)")}},
+
+    {0x22, {DIV_CMD_C64_PW_SLIDE, _("22xx: Pulse width slide up"), effectVal, constVal<1>}},
+    {0x23, {DIV_CMD_C64_PW_SLIDE, _("23xx: Pulse width slide down"), effectVal, constVal<-1>}},
+
+    {0x24, {DIV_CMD_C64_CUTOFF_SLIDE, _("24xx: Filter cutoff slide up"), effectVal, constVal<1>}},
+    {0x25, {DIV_CMD_C64_CUTOFF_SLIDE, _("25xx: Filter cutoff slide down"), effectVal, constVal<-1>}},
   };
   const EffectHandler c64FineDutyHandler(DIV_CMD_C64_FINE_DUTY, _("3xxx: Set pulse width (0 to FFF)"), effectValLong<12>);
   const EffectHandler c64FineCutoffHandler(DIV_CMD_C64_FINE_CUTOFF, _("4xxx: Set cutoff (0 to 7FF)"), effectValLong<11>);
@@ -684,6 +690,12 @@ void DivEngine::registerSystems() {
     {0x14, {DIV_CMD_C64_FILTER_RESET, _("14xy: Reset cutoff (x: on new note; y: now)")}},
     {0x15, {DIV_CMD_C64_DUTY_RESET, _("15xy: Reset pulse width (x: on new note; y: now)")}},
     {0x16, {DIV_CMD_C64_EXTENDED, _("16xy: Change other parameters")}},
+
+    {0x17, {DIV_CMD_C64_PW_SLIDE, _("17xx: Pulse width slide up"), effectVal, constVal<1>}},
+    {0x18, {DIV_CMD_C64_PW_SLIDE, _("18xx: Pulse width slide down"), effectVal, constVal<-1>}},
+
+    {0x19, {DIV_CMD_C64_CUTOFF_SLIDE, _("19xx: Filter cutoff slide up"), effectVal, constVal<1>}},
+    {0x1A, {DIV_CMD_C64_CUTOFF_SLIDE, _("1Axx: Filter cutoff slide down"), effectVal, constVal<-1>}},
   };
   const EffectHandler SID2FineDutyHandler(DIV_CMD_C64_FINE_DUTY, _("3xxx: Set pulse width (0 to FFF)"), effectValLong<12>);
   const EffectHandler SID2FineCutoffHandler(DIV_CMD_C64_FINE_CUTOFF, _("4xxx: Set cutoff (0 to FFF)"), effectValLong<11>);
@@ -737,6 +749,18 @@ void DivEngine::registerSystems() {
     {0xA1, {DIV_CMD_SID3_FILTER_CONNECTION, _("A1xy: Set filter connection (x: filter (0-3); y: bit 0: connect to channel input; bit 1: connect to channel output)")}},
     {0xA2, {DIV_CMD_SID3_FILTER_MATRIX, _("A2xy: Set filter connection matrix (x: filter (0-3); y: bits 0-3: add filter 1-4 output to filter's input)")}},
     {0xA3, {DIV_CMD_SID3_FILTER_ENABLE, _("A3xy: Enable filter (x: filter (0-3); y: enable)")}},
+
+    {0xA4, {DIV_CMD_C64_PW_SLIDE, _("A4xx: Pulse width slide up"), effectVal, constVal<1>}},
+    {0xA5, {DIV_CMD_C64_PW_SLIDE, _("A5xx: Pulse width slide down"), effectVal, constVal<-1>}},
+
+    {0xA6, {DIV_CMD_C64_CUTOFF_SLIDE, _("A6xx: Filter 1 cutoff slide up"), effectVal, constVal<1>}},
+    {0xA7, {DIV_CMD_C64_CUTOFF_SLIDE, _("A7xx: Filter 1 cutoff slide down"), effectVal, constVal<-1>}},
+    {0xA8, {DIV_CMD_C64_CUTOFF_SLIDE, _("A8xx: Filter 2 cutoff slide up"), effectVal, constVal<2>}},
+    {0xA9, {DIV_CMD_C64_CUTOFF_SLIDE, _("A9xx: Filter 2 cutoff slide down"), effectVal, constVal<-2>}},
+    {0xAA, {DIV_CMD_C64_CUTOFF_SLIDE, _("AAxx: Filter 3 cutoff slide up"), effectVal, constVal<3>}},
+    {0xAB, {DIV_CMD_C64_CUTOFF_SLIDE, _("ABxx: Filter 3 cutoff slide down"), effectVal, constVal<-3>}},
+    {0xAC, {DIV_CMD_C64_CUTOFF_SLIDE, _("ACxx: Filter 4 cutoff slide up"), effectVal, constVal<4>}},
+    {0xAD, {DIV_CMD_C64_CUTOFF_SLIDE, _("ADxx: Filter 4 cutoff slide down"), effectVal, constVal<-4>}},
   };
 
   const EffectHandler SID3FineDutyHandler(DIV_CMD_C64_FINE_DUTY, _("5xxx: Set pulse width (0 to FFF)"), effectValLong<12>);
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index 473c6ea07..9a376aa85 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -421,16 +421,16 @@ const FurnaceGUIColors fxColors[256]={
   GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
   GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
   GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
-  GUI_COLOR_PATTERN_EFFECT_INVALID,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
+  GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
   GUI_COLOR_PATTERN_EFFECT_INVALID,
 
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index a9152ccdf..79bcdbf0b 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -6486,8 +6486,27 @@ void FurnaceGUI::drawInsEdit() {
           }
           for (DivInstrumentType i: insTypeList) {
             if (ImGui::Selectable(insTypes[i][0],insType==i)) {
+              DivInstrumentType prevType = ins->type;
               ins->type=i;
 
+              //clamp some settings
+              if(prevType == DIV_INS_SID3)
+              {
+                ins->c64.a = CLAMP(ins->c64.a, 0, 15);
+                ins->c64.d = CLAMP(ins->c64.a, 0, 15);
+                ins->c64.s = CLAMP(ins->c64.a, 0, 15);
+                ins->c64.r = CLAMP(ins->c64.a, 0, 15);
+
+                ins->c64.duty = CLAMP(ins->c64.a, 0, 0xfff);
+
+                ins->sid2.mixMode = CLAMP(ins->sid2.mixMode, 0, 3);
+              }
+              if(prevType == DIV_INS_SID3 || prevType == DIV_INS_SID2)
+              {
+                ins->c64.cut = CLAMP(ins->c64.cut, 0, 0x7ff);
+                ins->c64.res = CLAMP(ins->c64.res, 0, 0xf);
+              }
+
               // reset macro zoom
               ins->std.volMacro.vZoom=-1;
               ins->std.dutyMacro.vZoom=-1;