diff --git a/papers/newIns.md b/papers/newIns.md
index 2533a2b6c..037a132f5 100644
--- a/papers/newIns.md
+++ b/papers/newIns.md
@@ -333,7 +333,8 @@ size | description
   2  | duty
   2  | cutoff/resonance
      | - bit 12-15: resonance
-     | - bit 0-10: cutoff
+     | - bit 0-10: cutoff (0-11 on SID2)
+  1  | upper nibble of resonance (for SID2) (>=199)
 ```
 
 ## C64 compatibility note (>=187)
diff --git a/src/engine/engine.h b/src/engine/engine.h
index ed2512b49..9a7b45ddb 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -54,8 +54,8 @@ class DivWorkPool;
 
 #define DIV_UNSTABLE
 
-#define DIV_VERSION "dev198"
-#define DIV_ENGINE_VERSION 198
+#define DIV_VERSION "dev199"
+#define DIV_ENGINE_VERSION 199
 // for imports
 #define DIV_VERSION_MOD 0xff01
 #define DIV_VERSION_FC 0xff02
diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index 96d5492d1..d6407ec6c 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -481,7 +481,9 @@ void DivInstrument::writeFeature64(SafeWriter* w) {
   w->writeC(((c64.a&15)<<4)|(c64.d&15));
   w->writeC(((c64.s&15)<<4)|(c64.r&15));
   w->writeS(c64.duty);
-  w->writeS((unsigned short)((c64.cut&2047)|(c64.res<<12)));
+  w->writeS((unsigned short)((c64.cut&4095)|((c64.res&15)<<12)));
+
+  w->writeC((c64.res>>4)&15);
 
   FEATURE_END;
 }
@@ -1647,9 +1649,13 @@ void DivInstrument::readFeature64(SafeReader& reader, bool& volIsCutoff, short v
   c64.duty=reader.readS()&4095;
 
   unsigned short cr=reader.readS();
-  c64.cut=cr&2047;
+  c64.cut=cr&4095;
   c64.res=cr>>12;
 
+  if (version>=199) {
+    c64.res|=((unsigned char)reader.readC())<<4;
+  }
+
   READ_FEAT_END;
 }
 
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index ece1c7a86..645d73d6e 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -5754,8 +5754,13 @@ void FurnaceGUI::drawInsEdit() {
           P(ImGui::Checkbox("Enable filter",&ins->c64.toFilter));
           P(ImGui::Checkbox("Initialize filter",&ins->c64.initFilter));
           
-          P(CWSliderScalar("Cutoff",ImGuiDataType_U16,&ins->c64.cut,&_ZERO,&_TWO_THOUSAND_FORTY_SEVEN)); rightClickable
-          P(CWSliderScalar("Resonance",ImGuiDataType_U8,&ins->c64.res,&_ZERO,&_FIFTEEN)); rightClickable
+          if (ins->type==DIV_INS_SID2) {
+            P(CWSliderScalar("Cutoff",ImGuiDataType_U16,&ins->c64.cut,&_ZERO,&_FOUR_THOUSAND_NINETY_FIVE)); rightClickable
+            P(CWSliderScalar("Resonance",ImGuiDataType_U8,&ins->c64.res,&_ZERO,&_TWO_HUNDRED_FIFTY_FIVE)); rightClickable
+          } else {
+            P(CWSliderScalar("Cutoff",ImGuiDataType_U16,&ins->c64.cut,&_ZERO,&_TWO_THOUSAND_FORTY_SEVEN)); rightClickable
+            P(CWSliderScalar("Resonance",ImGuiDataType_U8,&ins->c64.res,&_ZERO,&_FIFTEEN)); rightClickable
+          }
 
           ImGui::AlignTextToFramePadding();
           ImGui::Text("Filter Mode");
@@ -7048,7 +7053,7 @@ void FurnaceGUI::drawInsEdit() {
           }
           if (ins->type==DIV_INS_SID2) {
             ex1Max=3;
-            ex2Max=15;
+            ex2Max=255;
           }
           if (ins->type==DIV_INS_X1_010) {
             dutyMax=0;
@@ -7292,6 +7297,17 @@ void FurnaceGUI::drawInsEdit() {
                 cutoffMin=0;
                 cutoffMax=2047;
               }
+
+              if (ins->type==DIV_INS_SID2) {
+                if (ins->c64.filterIsAbs) {
+                  cutoffMin=0;
+                  cutoffMax=4095;
+                } else {
+                  cutoffMin=-4095;
+                  cutoffMax=4095;
+                }
+              }
+
               macroList.push_back(FurnaceGUIMacroDesc("Cutoff",&ins->std.algMacro,cutoffMin,cutoffMax,160,uiColors[GUI_COLOR_MACRO_OTHER]));
               macroList.push_back(FurnaceGUIMacroDesc("Filter Mode",&ins->std.ex1Macro,0,ex1Max,64,uiColors[GUI_COLOR_MACRO_OTHER],false,NULL,NULL,true,filtModeBits));
             } else if (ins->type==DIV_INS_SAA1099) {
@@ -7327,8 +7343,10 @@ void FurnaceGUI::drawInsEdit() {
             }
           }
           if (ex2Max>0) {
-            if (ins->type==DIV_INS_C64 || ins->type==DIV_INS_SID2) {
+            if (ins->type==DIV_INS_C64) {
               macroList.push_back(FurnaceGUIMacroDesc("Resonance",&ins->std.ex2Macro,0,ex2Max,64,uiColors[GUI_COLOR_MACRO_OTHER]));
+            } else if (ins->type==DIV_INS_SID2) {
+              macroList.push_back(FurnaceGUIMacroDesc("Resonance",&ins->std.ex2Macro,0,ex2Max,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             } else if (ins->type==DIV_INS_FDS) {
               macroList.push_back(FurnaceGUIMacroDesc("Mod Speed",&ins->std.ex2Macro,0,ex2Max,160,uiColors[GUI_COLOR_MACRO_OTHER]));
             } else if (ins->type==DIV_INS_SU) {