diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b48c493b..2fbae0f5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -89,6 +89,19 @@ jobs:
         echo "::set-output name=id::${package_name}"
         echo "::set-output name=filename::${package_name}${package_ext}"
 
+    - name: Set build cores amount
+      id: build-cores
+      run: |
+        # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources
+        set amount=2
+        if [ '${{ runner.os }}' == 'macOS' ]; then
+          amount=3
+        fi
+
+        echo "Amount of cores we can build with: ${amount}"
+
+        echo "::set-output name=amount::${amount}"
+
     - name: Setup Toolchain [Windows MSVC]
       if: ${{ matrix.config.compiler == 'msvc' }}
       uses: seanmiddleditch/gha-setup-vsdevenv@v3
@@ -125,9 +138,6 @@ jobs:
         export CMAKE_EXTRA_ARGS=()
         if [ '${{ matrix.config.compiler }}' == 'msvc' ]; then
           CMAKE_EXTRA_ARGS+=('-DCMAKE_GENERATOR_PLATFORM=${{ steps.windows-identify.outputs.msvc-target }}')
-
-          # FIXME We don't want all the MSVC warnings to cause errors yet
-          export USE_WAE=OFF
         elif [ '${{ matrix.config.compiler }}' == 'mingw' ]; then
           CMAKE_EXTRA_ARGS+=('-DCMAKE_TOOLCHAIN_FILE=scripts/Cross-MinGW-${{ steps.windows-identify.outputs.mingw-target }}.cmake')
         else
@@ -159,7 +169,7 @@ jobs:
         cmake \
           --build ${PWD}/build \
           --config ${{ env.BUILD_TYPE }} \
-          --parallel 2
+          --parallel ${{ steps.build-cores.outputs.amount }}
 
     - name: Install (System Libraries)
       if: ${{ runner.os == 'Linux' && matrix.config.compiler != 'mingw' }}
@@ -180,9 +190,6 @@ jobs:
         if [ '${{ matrix.config.compiler }}' == 'msvc' ]; then
           CMAKE_EXTRA_ARGS+=('-DCMAKE_GENERATOR_PLATFORM=${{ steps.windows-identify.outputs.msvc-target }}')
 
-          # FIXME We don't want all the MSVC warnings to cause errors yet
-          export USE_WAE=OFF
-
           # Force static linking
           # 1. Make MSVC runtime configurable
           CMAKE_EXTRA_ARGS+=('-DCMAKE_POLICY_DEFAULT_CMP0091=NEW')
@@ -211,7 +218,7 @@ jobs:
         cmake \
           --build ${PWD}/build \
           --config ${{ env.BUILD_TYPE }} \
-          --parallel 2
+          --parallel ${{ steps.build-cores.outputs.amount }}
 
     - name: Package [Windows]
       if: ${{ runner.os == 'Windows' || matrix.config.compiler == 'mingw' }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 769842f3..fef510ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,6 +177,10 @@ else()
   add_subdirectory(extern/SDL EXCLUDE_FROM_ALL)
   list(APPEND DEPENDENCIES_INCLUDE_DIRS extern/SDL/include)
   list(APPEND DEPENDENCIES_LIBRARIES SDL2-static)
+  # Work around add_subdirectory'd SDL not propagating HAVE_LIBC to MSVC furnace build
+  if (MSVC)
+    list(APPEND DEPENDENCIES_COMPILE_OPTIONS "/DHAVE_LIBC")
+  endif()
   message(STATUS "Using vendored SDL2")
 endif()
 
@@ -457,9 +461,13 @@ if (NOT MSVC)
     list(APPEND WARNING_FLAGS -Werror)
   endif()
 else()
-  # /wd4100 == -Wno-unused-parameter
-  add_compile_options("/source-charset:utf-8")
-  set(WARNING_FLAGS /W4 /wd4100 /D_CRT_SECURE_NO_WARNINGS)
+  add_compile_options("/utf-8")
+  set(WARNING_FLAGS /W2 /D_CRT_SECURE_NO_WARNINGS)
+  list(APPEND WARNING_FLAGS
+    /wd4244 # implicit type conversions
+    /wd4305 # truncations
+    /wd4309 # truncations of constant values
+  )
   if (WARNINGS_ARE_ERRORS)
     list(APPEND WARNING_FLAGS /WX)
   endif()
diff --git a/extern/pfd-fixed/portable-file-dialogs.h b/extern/pfd-fixed/portable-file-dialogs.h
index 008fe0a9..fc6df0a1 100644
--- a/extern/pfd-fixed/portable-file-dialogs.h
+++ b/extern/pfd-fixed/portable-file-dialogs.h
@@ -1331,6 +1331,14 @@ inline std::string internal::file_dialog::select_folder_vista(IFileDialog *ifd,
 
 // notify implementation
 
+#if _WIN32
+inline BOOL WINAPI icon_enum_callback(HMODULE hModule, LPCTSTR lpType, LPTSTR lpName, LONG_PTR lParam)
+{
+    ((NOTIFYICONDATAW *)lParam)->hIcon = ::LoadIcon(GetModuleHandle(nullptr), lpName);
+    return false;
+};
+#endif
+
 inline notify::notify(std::string const &title,
                       std::string const &message,
                       icon _icon /* = icon::info */)
@@ -1383,14 +1391,8 @@ inline notify::notify(std::string const &title,
         /* case icon::info: */ default: nid->dwInfoFlags = NIIF_INFO; break;
     }
 
-    ENUMRESNAMEPROC icon_enum_callback = [](HMODULE, LPCTSTR, LPTSTR lpName, LONG_PTR lParam) -> BOOL WINAPI
-    {
-        ((NOTIFYICONDATAW *)lParam)->hIcon = ::LoadIcon(GetModuleHandle(nullptr), lpName);
-        return false;
-    };
-
     nid->hIcon = ::LoadIcon(nullptr, IDI_APPLICATION);
-    ::EnumResourceNames(nullptr, RT_GROUP_ICON, icon_enum_callback, (LONG_PTR)nid.get());
+    ::EnumResourceNames(nullptr, RT_GROUP_ICON, (ENUMRESNAMEPROC)icon_enum_callback, (LONG_PTR)nid.get());
 
     nid->uTimeout = 5000;
 
diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index b4394f60..5a1c2db6 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -319,6 +319,18 @@ class DivDispatch {
      */
     virtual int getPortaFloor(int ch);
 
+    /**
+     * get the required amplification level of this dispatch's output.
+     * @return the amplification level.
+     */
+    virtual float getPostAmp();
+
+    /**
+     * check whether DC offset correction is required.
+     * @return truth.
+     */
+    virtual bool getDCOffRequired();
+
     /**
      * get a description of a dispatch-specific effect.
      * @param effect the effect.
diff --git a/src/engine/dispatchContainer.cpp b/src/engine/dispatchContainer.cpp
index ba72a695..c89a0fa0 100644
--- a/src/engine/dispatchContainer.cpp
+++ b/src/engine/dispatchContainer.cpp
@@ -79,6 +79,11 @@ void DivDispatchContainer::flush(size_t count) {
 }
 
 void DivDispatchContainer::fillBuf(size_t runtotal, size_t offset, size_t size) {
+  if (dcOffCompensation && runtotal>0) {
+    dcOffCompensation=false;
+    prevSample[0]=bbIn[0][0];
+    if (dispatch->isStereo()) prevSample[1]=bbIn[1][0];
+  }
   if (lowQuality) {
     for (size_t i=0; i<runtotal; i++) {
       temp[0]=bbIn[0][i];
@@ -126,6 +131,9 @@ void DivDispatchContainer::clear() {
   temp[1]=0;
   prevSample[0]=0;
   prevSample[1]=0;
+  if (dispatch->getDCOffRequired()) {
+    dcOffCompensation=true;
+  }
   // run for one cycle to determine DC offset
   // TODO: SAA1099 doesn't like that
   /*dispatch->acquire(bbIn[0],bbIn[1],0,1);
diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index 78ae1ce4..5288b839 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -17,9 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "dataErrors.h"
-#include "song.h"
-#include <functional>
 #define _USE_MATH_DEFINES
 #include "engine.h"
 #include "instrument.h"
@@ -873,6 +870,11 @@ void DivEngine::play() {
   for (int i=0; i<DIV_MAX_CHANS; i++) {
     keyHit[i]=false;
   }
+  if (output) if (!skipping && output->midiOut!=NULL) {
+    int pos=totalTicksR/6;
+    output->midiOut->send(TAMidiMessage(TA_MIDI_POSITION,(pos>>7)&0x7f,pos&0x7f));
+    output->midiOut->send(TAMidiMessage(TA_MIDI_MACHINE_PLAY,0,0));
+  }
   BUSY_END;
 }
 
@@ -918,6 +920,14 @@ void DivEngine::stop() {
   for (int i=0; i<song.systemLen; i++) {
     disCont[i].dispatch->notifyPlaybackStop();
   }
+  if (output) if (output->midiOut!=NULL) {
+    output->midiOut->send(TAMidiMessage(TA_MIDI_MACHINE_STOP,0,0));
+    for (int i=0; i<chans; i++) {
+      if (chan[i].curMidiNote>=0) {
+        output->midiOut->send(TAMidiMessage(0x80|(i&15),chan[i].curMidiNote,0));
+      }
+    }
+  }
   BUSY_END;
 }
 
diff --git a/src/engine/engine.h b/src/engine/engine.h
index bf9fe07e..dd9bf25c 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -86,7 +86,8 @@ struct DivChannelState {
   bool doNote, legato, portaStop, keyOn, keyOff, nowYouCanStop, stopOnOff;
   bool arpYield, delayLocked, inPorta, scheduledSlideReset, shorthandPorta, noteOnInhibit, resetArp;
 
-  int midiNote, curMidiNote;
+  int midiNote, curMidiNote, midiPitch;
+  bool midiAftertouch;
 
   DivChannelState():
     note(-1),
@@ -130,7 +131,9 @@ struct DivChannelState {
     noteOnInhibit(false),
     resetArp(false),
     midiNote(-1),
-    curMidiNote(-1) {}
+    curMidiNote(-1),
+    midiPitch(-1),
+    midiAftertouch(false) {}
 };
 
 struct DivNoteEvent {
@@ -151,7 +154,7 @@ struct DivDispatchContainer {
   int temp[2], prevSample[2];
   short* bbIn[2];
   short* bbOut[2];
-  bool lowQuality;
+  bool lowQuality, dcOffCompensation;
 
   void setRates(double gotRate);
   void setQuality(bool lowQual);
@@ -169,7 +172,8 @@ struct DivDispatchContainer {
     prevSample{0,0},
     bbIn{NULL,NULL},
     bbOut{NULL,NULL},
-    lowQuality(false) {}
+    lowQuality(false),
+    dcOffCompensation(false) {}
 };
 
 class DivEngine {
@@ -295,6 +299,7 @@ class DivEngine {
     bool keyHit[DIV_MAX_CHANS];
     float* oscBuf[2];
     float oscSize;
+    int oscReadPos, oscWritePos;
 
     void runExportThread();
     void nextBuf(float** in, float** out, int inChans, int outChans, unsigned int size);
@@ -769,6 +774,8 @@ class DivEngine {
       totalProcessed(0),
       oscBuf{NULL,NULL},
       oscSize(1),
+      oscReadPos(0),
+      oscWritePos(0),
       adpcmAMem(NULL),
       adpcmAMemLen(0),
       adpcmBMem(NULL),
diff --git a/src/engine/filter.cpp b/src/engine/filter.cpp
index 729c8caa..8e0ac02e 100644
--- a/src/engine/filter.cpp
+++ b/src/engine/filter.cpp
@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include <stddef.h>
 #define _USE_MATH_DEFINES
 #include <math.h>
 #include "filter.h"
@@ -85,4 +84,4 @@ float* DivFilterTables::getSincIntegralTable() {
     }
   }
   return sincIntegralTable;
-}
\ No newline at end of file
+}
diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index 9369df9d..ce25d87a 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -567,12 +567,12 @@ void DivInstrument::putInsData(SafeWriter* w) {
   w->writeC(ws.param4);
 }
 
-void readMacroData(DivInstrumentMacro &m, SafeReader& reader, short version) {
+DivDataErrors DivInstrument::readMacroData(DivInstrumentMacro& m, SafeReader& reader, short version) {
   char magic[4];
   reader.read(magic,4);
   if (memcmp(magic,"MACR",4)!=0) {
     logE("invalid macro header!\n");
-    return /*DIV_DATA_INVALID_HEADER*/;
+    return DIV_DATA_INVALID_HEADER;
   }
   reader.readI();
 
@@ -591,7 +591,7 @@ void readMacroData(DivInstrumentMacro &m, SafeReader& reader, short version) {
     reader.readI(); // reserved
     reader.readI(); // reserved
   }
-  /*return DIV_DATA_SUCCESS*/;
+  return DIV_DATA_SUCCESS;
 }
 
 DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
@@ -695,65 +695,173 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
   for (int k=0; k<14; k++) reader.readC();
 
   if (istest) {
-    readMacroData(std.volMacro,reader,version);
-    readMacroData(std.arpMacro,reader,version);
-    readMacroData(std.dutyMacro,reader,version);
-    readMacroData(std.waveMacro,reader,version);
-    readMacroData(std.pitchMacro,reader,version);
-    readMacroData(std.ex1Macro,reader,version);
-    readMacroData(std.ex2Macro,reader,version);
-    readMacroData(std.ex3Macro,reader,version);
-    readMacroData(std.algMacro,reader,version);
-    readMacroData(std.fbMacro,reader,version);
-    readMacroData(std.fmsMacro,reader,version);
-    readMacroData(std.fms2Macro,reader,version);
-    readMacroData(std.amsMacro,reader,version);
-    readMacroData(std.ams2Macro,reader,version);
-    readMacroData(std.panLMacro,reader,version);
-    readMacroData(std.panRMacro,reader,version);
-    readMacroData(std.phaseResetMacro,reader,version);
-    readMacroData(std.ex4Macro,reader,version);
-    readMacroData(std.ex5Macro,reader,version);
-    readMacroData(std.ex6Macro,reader,version);
-    readMacroData(std.ex7Macro,reader,version);
-    readMacroData(std.ex8Macro,reader,version);
+    if (readMacroData(std.volMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.arpMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.dutyMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.waveMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.pitchMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex1Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex3Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.algMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.fbMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.fmsMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.fms2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.amsMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ams2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.panLMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.panRMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.phaseResetMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex4Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex5Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex6Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex7Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ex8Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
     // FM macros
     for (int i=0; i<4; i++) {
       DivInstrumentSTD::OpMacro& op=std.opMacros[i];
-      readMacroData(op.amMacro,reader,version);
-      readMacroData(op.arMacro,reader,version);
-      readMacroData(op.drMacro,reader,version);
-      readMacroData(op.multMacro,reader,version);
-      readMacroData(op.rrMacro,reader,version);
-      readMacroData(op.slMacro,reader,version);
-      readMacroData(op.tlMacro,reader,version);
-      readMacroData(op.dt2Macro,reader,version);
-      readMacroData(op.rsMacro,reader,version);
-      readMacroData(op.dtMacro,reader,version);
-      readMacroData(op.d2rMacro,reader,version);
-      readMacroData(op.ssgMacro,reader,version);
-      readMacroData(op.damMacro,reader,version);
-      readMacroData(op.dvbMacro,reader,version);
-      readMacroData(op.egtMacro,reader,version);
-      readMacroData(op.kslMacro,reader,version);
-      readMacroData(op.susMacro,reader,version);
-      readMacroData(op.vibMacro,reader,version);
-      readMacroData(op.wsMacro,reader,version);
-      readMacroData(op.ksrMacro,reader,version);
+      if (readMacroData(op.amMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.arMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.drMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.multMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.rrMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.slMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.tlMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.dt2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.rsMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.dtMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.d2rMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.ssgMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.damMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.dvbMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.egtMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.kslMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.susMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.vibMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.wsMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
+      if (readMacroData(op.ksrMacro,reader,version)!=DIV_DATA_SUCCESS) {
+        return DIV_DATA_INVALID_HEADER;
+      }
     }
     // wavesynth macros
-    readMacroData(std.ws.wave1Macro,reader,version);
-    readMacroData(std.ws.wave2Macro,reader,version);
-    readMacroData(std.ws.rateDividerMacro,reader,version);
-    readMacroData(std.ws.effectMacro,reader,version);
-    readMacroData(std.ws.oneShotMacro,reader,version);
-    readMacroData(std.ws.enabledMacro,reader,version);
-    readMacroData(std.ws.globalMacro,reader,version);
-    readMacroData(std.ws.speedMacro,reader,version);
-    readMacroData(std.ws.param1Macro,reader,version);
-    readMacroData(std.ws.param2Macro,reader,version);
-    readMacroData(std.ws.param3Macro,reader,version);
-    readMacroData(std.ws.param4Macro,reader,version);
+    if (readMacroData(std.ws.wave1Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.wave2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.rateDividerMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.effectMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.oneShotMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.enabledMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.globalMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.speedMacro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.param1Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.param2Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.param3Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
+    if (readMacroData(std.ws.param4Macro,reader,version)!=DIV_DATA_SUCCESS) {
+      return DIV_DATA_INVALID_HEADER;
+    }
   }
   if (!istest) {
     // standard
@@ -882,18 +990,42 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
 
       for (int i=0; i<4; i++) {
         DivInstrumentSTD::OpMacro& op=std.opMacros[i];
-        reader.readByte(op.amMacro.val,op.amMacro.len,1);
-        reader.readByte(op.arMacro.val,op.arMacro.len,1);
-        reader.readByte(op.drMacro.val,op.drMacro.len,1);
-        reader.readByte(op.multMacro.val,op.multMacro.len,1);
-        reader.readByte(op.rrMacro.val,op.rrMacro.len,1);
-        reader.readByte(op.slMacro.val,op.slMacro.len,1);
-        reader.readByte(op.tlMacro.val,op.tlMacro.len,1);
-        reader.readByte(op.dt2Macro.val,op.dt2Macro.len,1);
-        reader.readByte(op.rsMacro.val,op.rsMacro.len,1);
-        reader.readByte(op.dtMacro.val,op.dtMacro.len,1);
-        reader.readByte(op.d2rMacro.val,op.d2rMacro.len,1);
-        reader.readByte(op.ssgMacro.val,op.ssgMacro.len,1);
+        for (int l=0; l<op.amMacro.len; l++) {
+          op.amMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.arMacro.len; l++) {
+          op.arMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.drMacro.len; l++) {
+          op.drMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.multMacro.len; l++) {
+          op.multMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.rrMacro.len; l++) {
+          op.rrMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.slMacro.len; l++) {
+          op.slMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.tlMacro.len; l++) {
+          op.tlMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.dt2Macro.len; l++) {
+          op.dt2Macro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.rsMacro.len; l++) {
+          op.rsMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.dtMacro.len; l++) {
+          op.dtMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.d2rMacro.len; l++) {
+          op.d2rMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.ssgMacro.len; l++) {
+          op.ssgMacro.val[l]=(unsigned char)reader.readC();
+        }
       }
     }
 
@@ -974,14 +1106,30 @@ DivDataErrors DivInstrument::readInsData(SafeReader& reader, short version) {
 
       for (int i=0; i<4; i++) {
         DivInstrumentSTD::OpMacro& op=std.opMacros[i];
-        reader.readByte(op.damMacro.val,op.damMacro.len,1);
-        reader.readByte(op.dvbMacro.val,op.dvbMacro.len,1);
-        reader.readByte(op.egtMacro.val,op.egtMacro.len,1);
-        reader.readByte(op.kslMacro.val,op.kslMacro.len,1);
-        reader.readByte(op.susMacro.val,op.susMacro.len,1);
-        reader.readByte(op.vibMacro.val,op.vibMacro.len,1);
-        reader.readByte(op.wsMacro.val,op.wsMacro.len,1);
-        reader.readByte(op.ksrMacro.val,op.ksrMacro.len,1);
+        for (int l=0; l<op.damMacro.len; l++) {
+          op.damMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.dvbMacro.len; l++) {
+          op.dvbMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.egtMacro.len; l++) {
+          op.egtMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.kslMacro.len; l++) {
+          op.kslMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.susMacro.len; l++) {
+          op.susMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.vibMacro.len; l++) {
+          op.vibMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.wsMacro.len; l++) {
+          op.wsMacro.val[l]=(unsigned char)reader.readC();
+        }
+        for (int l=0; l<op.ksrMacro.len; l++) {
+          op.ksrMacro.val[l]=(unsigned char)reader.readC();
+        }
       }
     }
   }
diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index dd56ef84..6d79f99f 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -437,7 +437,7 @@ struct DivInstrument {
    * @param version the format version.
    * @return a DivDataErrors.
    */
-  void readMacroData(DivInstrumentMacro& m, SafeReader& reader, short version);
+  DivDataErrors readMacroData(DivInstrumentMacro& m, SafeReader& reader, short version);
 
   /**
    * save this instrument to a file.
diff --git a/src/engine/macroInt.cpp b/src/engine/macroInt.cpp
index 9a878942..aafeedbc 100644
--- a/src/engine/macroInt.cpp
+++ b/src/engine/macroInt.cpp
@@ -62,134 +62,84 @@ void DivMacroInt::release() {
 
 void DivMacroInt::init(DivInstrument* which) {
   ins=which;
-  macroList.clear();
-  // initialize common macros
-  vol.init();
-  arp.init();
-  duty.init();
-  wave.init();
-  pitch.init();
-  ex1.init();
-  ex2.init();
-  ex3.init();
-  alg.init();
-  fb.init();
-  fms.init();
-  ams.init();
-  fms2.init();
-  ams2.init();
-  panL.init();
-  panR.init();
-  phaseReset.init();
-  ex4.init();
-  ex5.init();
-  ex6.init();
-  ex7.init();
-  ex8.init();
+  // initialize
+  while (!macroList.empty()) {
+    macroList.front().init();
+    macroList.pop_front();
+  }
 
   released=false;
 
-  // initialize FM operator macro
-  op[0]=IntOp();
-  op[1]=IntOp();
-  op[2]=IntOp();
-  op[3]=IntOp();
-
-  // initialize wavesynth macro
-  ws=IntWS();
-
   if (ins==NULL) return;
 
   // prepare common macro
   if (ins->std.volMacro.len>0) {
     macroList.push_back(DivMacroExecList(vol,ins->std.volMacro));
-    vol.prepare(&ins->std.volMacro);
   }
   if (ins->std.arpMacro.len>0) {
     macroList.push_back(DivMacroExecList(arp,ins->std.arpMacro));
-    arp.prepare(&ins->std.arpMacro);
   }
   if (ins->std.dutyMacro.len>0) {
     macroList.push_back(DivMacroExecList(duty,ins->std.dutyMacro));
-    duty.prepare(&ins->std.dutyMacro);
   }
   if (ins->std.waveMacro.len>0) {
     macroList.push_back(DivMacroExecList(wave,ins->std.waveMacro));
-    wave.prepare(&ins->std.waveMacro);
   }
   if (ins->std.pitchMacro.len>0) {
     macroList.push_back(DivMacroExecList(pitch,ins->std.pitchMacro));
-    pitch.prepare(&ins->std.pitchMacro);
   }
   if (ins->std.ex1Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex1,ins->std.ex1Macro));
-    ex1.prepare(&ins->std.ex1Macro);
   }
   if (ins->std.ex2Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex2,ins->std.ex2Macro));
-    ex2.prepare(&ins->std.ex2Macro);
   }
   if (ins->std.ex3Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex3,ins->std.ex3Macro));
-    ex3.prepare(&ins->std.ex3Macro);
   }
   if (ins->std.algMacro.len>0) {
     macroList.push_back(DivMacroExecList(alg,ins->std.algMacro));
-    alg.prepare(&ins->std.algMacro);
   }
   if (ins->std.fbMacro.len>0) {
     macroList.push_back(DivMacroExecList(fb,ins->std.fbMacro));
-    fb.prepare(&ins->std.fbMacro);
   }
   if (ins->std.fmsMacro.len>0) {
     macroList.push_back(DivMacroExecList(fms,ins->std.fmsMacro));
-    fms.prepare(&ins->std.fmsMacro);
   }
   if (ins->std.fms2Macro.len>0) {
     macroList.push_back(DivMacroExecList(fms2,ins->std.fms2Macro));
-    fms2.prepare(&ins->std.fms2Macro);
   }
   if (ins->std.amsMacro.len>0) {
     macroList.push_back(DivMacroExecList(ams,ins->std.amsMacro));
-    ams.prepare(&ins->std.amsMacro);
   }
   if (ins->std.ams2Macro.len>0) {
     macroList.push_back(DivMacroExecList(ams2,ins->std.ams2Macro));
-    ams2.prepare(&ins->std.ams2Macro);
   }
 
   // TODO: other macros
   if (ins->std.panLMacro.len>0) {
     macroList.push_back(DivMacroExecList(panL,ins->std.panLMacro));
-    panL.prepare(&ins->std.panLMacro);
   }
   if (ins->std.panRMacro.len>0) {
     macroList.push_back(DivMacroExecList(panR,ins->std.panRMacro));
-    panR.prepare(&ins->std.panRMacro);
   }
   if (ins->std.phaseResetMacro.len>0) {
     macroList.push_back(DivMacroExecList(phaseReset,ins->std.phaseResetMacro));
-    phaseReset.prepare(&ins->std.phaseResetMacro);
   }
   if (ins->std.ex4Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex4,ins->std.ex4Macro));
-    ex4.prepare(&ins->std.ex4Macro);
   }
   if (ins->std.ex5Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex5,ins->std.ex5Macro));
-    ex5.prepare(&ins->std.ex5Macro);
   }
   if (ins->std.ex6Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex6,ins->std.ex6Macro));
-    ex6.prepare(&ins->std.ex6Macro);
   }
   if (ins->std.ex7Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex7,ins->std.ex7Macro));
-    ex7.prepare(&ins->std.ex7Macro);
   }
   if (ins->std.ex8Macro.len>0) {
     macroList.push_back(DivMacroExecList(ex8,ins->std.ex8Macro));
-    ex8.prepare(&ins->std.ex8Macro);
   }
 
   // prepare FM operator macros
@@ -198,135 +148,103 @@ void DivMacroInt::init(DivInstrument* which) {
     IntOp& o=op[i];
     if (m.amMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.am,m.amMacro));
-      o.am.prepare(&m.amMacro);
     }
     if (m.arMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.ar,m.arMacro));
-      o.ar.prepare(&m.arMacro);
     }
     if (m.drMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.dr,m.drMacro));
-      o.dr.prepare(&m.drMacro);
     }
     if (m.multMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.mult,m.multMacro));
-      o.mult.prepare(&m.multMacro);
     }
     if (m.rrMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.rr,m.rrMacro));
-      o.rr.prepare(&m.rrMacro);
     }
     if (m.slMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.sl,m.slMacro));
-      o.sl.prepare(&m.slMacro);
     }
     if (m.tlMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.tl,m.tlMacro));
-      o.tl.prepare(&m.tlMacro);
     }
     if (m.dt2Macro.len>0) {
       macroList.push_back(DivMacroExecList(o.dt2,m.dt2Macro));
-      o.dt2.prepare(&m.dt2Macro);
     }
     if (m.rsMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.rs,m.rsMacro));
-      o.rs.prepare(&m.rsMacro);
     }
     if (m.dtMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.dt,m.dtMacro));
-      o.dt.prepare(&m.dtMacro);
     }
     if (m.d2rMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.d2r,m.d2rMacro));
-      o.d2r.prepare(&m.d2rMacro);
     }
     if (m.ssgMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.ssg,m.ssgMacro));
-      o.ssg.prepare(&m.ssgMacro);
     }
 
     if (m.damMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.dam,m.damMacro));
-      o.dam.prepare(&m.damMacro);
     }
     if (m.dvbMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.dvb,m.dvbMacro));
-      o.dvb.prepare(&m.dvbMacro);
     }
     if (m.egtMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.egt,m.egtMacro));
-      o.egt.prepare(&m.egtMacro);
     }
     if (m.kslMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.ksl,m.kslMacro));
-      o.ksl.prepare(&m.kslMacro);
     }
     if (m.susMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.sus,m.susMacro));
-      o.sus.prepare(&m.susMacro);
     }
     if (m.vibMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.vib,m.vibMacro));
-      o.vib.prepare(&m.vibMacro);
     }
     if (m.wsMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.ws,m.wsMacro));
-      o.ws.prepare(&m.wsMacro);
     }
     if (m.ksrMacro.len>0) {
       macroList.push_back(DivMacroExecList(o.ksr,m.ksrMacro));
-      o.ksr.prepare(&m.ksrMacro);
     }
   }
 
   // prepare wavesynth macros
   if (ins->std.ws.wave1Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.wave1,ins->std.ws.wave1Macro));
-    ws.wave1.prepare(&ins->std.ws.wave1Macro);
   }
   if (ins->std.ws.wave2Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.wave2,ins->std.ws.wave2Macro));
-    ws.wave2.prepare(&ins->std.ws.wave2Macro);
   }
   if (ins->std.ws.rateDividerMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.rateDivider,ins->std.ws.rateDividerMacro));
-    ws.rateDivider.prepare(&ins->std.ws.rateDividerMacro);
   }
   if (ins->std.ws.effectMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.effect,ins->std.ws.effectMacro));
-    ws.effect.prepare(&ins->std.ws.effectMacro);
   }
   if (ins->std.ws.oneShotMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.oneShot,ins->std.ws.oneShotMacro));
-    ws.oneShot.prepare(&ins->std.ws.oneShotMacro);
   }
   if (ins->std.ws.enabledMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.enabled,ins->std.ws.enabledMacro));
-    ws.enabled.prepare(&ins->std.ws.enabledMacro);
   }
   if (ins->std.ws.globalMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.global,ins->std.ws.globalMacro));
-    ws.global.prepare(&ins->std.ws.globalMacro);
   }
   if (ins->std.ws.speedMacro.len>0) {
     macroList.push_back(DivMacroExecList(ws.speed,ins->std.ws.speedMacro));
-    ws.speed.prepare(&ins->std.ws.speedMacro);
   }
   if (ins->std.ws.param1Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.param1,ins->std.ws.param1Macro));
-    ws.param1.prepare(&ins->std.ws.param1Macro);
   }
   if (ins->std.ws.param2Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.param2,ins->std.ws.param2Macro));
-    ws.param2.prepare(&ins->std.ws.param2Macro);
   }
   if (ins->std.ws.param3Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.param3,ins->std.ws.param3Macro));
-    ws.param3.prepare(&ins->std.ws.param3Macro);
   }
   if (ins->std.ws.param4Macro.len>0) {
     macroList.push_back(DivMacroExecList(ws.param4,ins->std.ws.param4Macro));
-    ws.param4.prepare(&ins->std.ws.param4Macro);
   }
   if (!macroList.empty()) {
       for (std::list<DivMacroExecList>::iterator iter = macroList.begin(); iter!= macroList.end(); iter++) {
diff --git a/src/engine/macroInt.h b/src/engine/macroInt.h
index d7236805..1bc93943 100644
--- a/src/engine/macroInt.h
+++ b/src/engine/macroInt.h
@@ -24,26 +24,20 @@
 #include <list>
 
 struct DivMacroStruct {
-  DivInstrumentMacro* source;
   int pos;
   int val;
   bool has, had, finished, will;
   unsigned int mode;
   void doMacro(DivInstrumentMacro& source, bool released);
   void init() {
-    source=NULL;
     pos=mode=0;
     has=had=will=false;
   }
-  void prepare(DivInstrumentMacro* s) {
-    if (s!=NULL) {
-      source=s;
-      has=had=will=true;
-      mode=source->mode;
-    }
+  void prepare(DivInstrumentMacro& source) {
+    has=had=will=true;
+    mode=source.mode;
   }
   DivMacroStruct():
-    source(NULL),
     pos(0),
     val(0),
     has(false),
@@ -56,8 +50,11 @@ struct DivMacroStruct {
 struct DivMacroExecList {
   DivMacroStruct& macro;
   DivInstrumentMacro& source;
+  void init() {
+    macro.init();
+  }
   void prepare() {
-    macro.prepare(&source);
+    macro.prepare(source);
   }
   void doMacro(bool released) {
     macro.doMacro(source, released);
@@ -155,6 +152,7 @@ class DivMacroInt {
 
     DivMacroInt():
       ins(NULL),
+      macroList(),
       released(false),
       vol(),
       arp(),
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index 7b6115ae..b860f680 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -74,6 +74,14 @@ int DivDispatch::getPortaFloor(int ch) {
   return 0x00;
 }
 
+float DivDispatch::getPostAmp() {
+  return 1.0f;
+}
+
+bool DivDispatch::getDCOffRequired() {
+  return false;
+}
+
 const char* DivDispatch::getEffectName(unsigned char effect) {
   return NULL;
 }
diff --git a/src/engine/platform/ay.cpp b/src/engine/platform/ay.cpp
index 6cdd6b03..30a83812 100644
--- a/src/engine/platform/ay.cpp
+++ b/src/engine/platform/ay.cpp
@@ -497,6 +497,10 @@ void DivPlatformAY8910::flushWrites() {
   while (!writes.empty()) writes.pop();
 }
 
+bool DivPlatformAY8910::getDCOffRequired() {
+  return true;
+}
+
 void DivPlatformAY8910::reset() {
   while (!writes.empty()) writes.pop();
   ay->device_reset();
diff --git a/src/engine/platform/ay.h b/src/engine/platform/ay.h
index 82b647f2..b1a3ea12 100644
--- a/src/engine/platform/ay.h
+++ b/src/engine/platform/ay.h
@@ -95,6 +95,7 @@ class DivPlatformAY8910: public DivDispatch {
     void setFlags(unsigned int flags);
     bool isStereo();
     bool keyOffAffectsArp(int ch);
+    bool getDCOffRequired();
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
     void poke(std::vector<DivRegWrite>& wlist);
diff --git a/src/engine/platform/ay8930.cpp b/src/engine/platform/ay8930.cpp
index de17fa67..a470dceb 100644
--- a/src/engine/platform/ay8930.cpp
+++ b/src/engine/platform/ay8930.cpp
@@ -123,7 +123,7 @@ void DivPlatformAY8930::acquire(short* bufL, short* bufR, size_t start, size_t l
   }
   while (!writes.empty()) {
     QueuedWrite w=writes.front();
-    if (bank!=(w.addr>>4)) {
+    if ((int)bank!=(w.addr>>4)) {
       bank=w.addr>>4;
       ay->address_w(0x0d);
       ay->data_w(0xa0|(bank<<4)|ayEnvMode[0]);
diff --git a/src/engine/platform/c64.cpp b/src/engine/platform/c64.cpp
index 786da058..736ed437 100644
--- a/src/engine/platform/c64.cpp
+++ b/src/engine/platform/c64.cpp
@@ -118,7 +118,7 @@ void DivPlatformC64::acquire(short* bufL, short* bufR, size_t start, size_t len)
 void DivPlatformC64::updateFilter() {
   rWrite(0x15,filtCut&7);
   rWrite(0x16,filtCut>>3);
-  rWrite(0x17,(filtRes<<4)|(chan[2].filter<<2)|(chan[1].filter<<1)|(chan[0].filter));
+  rWrite(0x17,(filtRes<<4)|(chan[2].filter<<2)|(chan[1].filter<<1)|(int)(chan[0].filter));
   rWrite(0x18,(filtControl<<4)|vol);
 }
 
@@ -177,7 +177,7 @@ void DivPlatformC64::tick() {
     }
     if (chan[i].std.wave.had) {
       chan[i].wave=chan[i].std.wave.val;
-      rWrite(i*7+4,(isMuted[i]?8:(chan[i].wave<<4))|(chan[i].ring<<2)|(chan[i].sync<<1)|chan[i].active);
+      rWrite(i*7+4,(isMuted[i]?8:(chan[i].wave<<4))|(chan[i].ring<<2)|(chan[i].sync<<1)|(int)(chan[i].active));
     }
     if (chan[i].std.ex1.had) {
       filtControl=chan[i].std.ex1.val&15;
@@ -232,7 +232,7 @@ int DivPlatformC64::dispatch(DivCommand c) {
         rWrite(c.chan*7+3,chan[c.chan].duty>>8);
       }
       if (chan[c.chan].insChanged) {
-        chan[c.chan].wave=(ins->c64.noiseOn<<3)|(ins->c64.pulseOn<<2)|(ins->c64.sawOn<<1)|(ins->c64.triOn);
+        chan[c.chan].wave=(ins->c64.noiseOn<<3)|(ins->c64.pulseOn<<2)|(ins->c64.sawOn<<1)|(int)(ins->c64.triOn);
         chan[c.chan].attack=ins->c64.a;
         chan[c.chan].decay=(ins->c64.s==15)?0:ins->c64.d;
         chan[c.chan].sustain=ins->c64.s;
@@ -245,7 +245,7 @@ int DivPlatformC64::dispatch(DivCommand c) {
         if (ins->c64.initFilter) {
           filtCut=ins->c64.cut;
           filtRes=ins->c64.res;
-          filtControl=ins->c64.lp|(ins->c64.bp<<1)|(ins->c64.hp<<2)|(ins->c64.ch3off<<3);
+          filtControl=(int)(ins->c64.lp)|(ins->c64.bp<<1)|(ins->c64.hp<<2)|(ins->c64.ch3off<<3);
         }
         updateFilter();
       }
@@ -330,7 +330,7 @@ int DivPlatformC64::dispatch(DivCommand c) {
       break;
     case DIV_CMD_WAVE:
       chan[c.chan].wave=c.value;
-      rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|chan[c.chan].active);
+      rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
       break;
     case DIV_CMD_LEGATO:
       chan[c.chan].baseFreq=NOTE_FREQUENCY(c.value+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(chan[c.chan].std.arp.val):(0)));
@@ -411,11 +411,11 @@ int DivPlatformC64::dispatch(DivCommand c) {
           break;
         case 4:
           chan[c.chan].ring=c.value;
-          rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|chan[c.chan].active);
+          rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
           break;
         case 5:
           chan[c.chan].sync=c.value;
-          rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|chan[c.chan].active);
+          rWrite(c.chan*7+4,(isMuted[c.chan]?8:(chan[c.chan].wave<<4))|(chan[c.chan].ring<<2)|(chan[c.chan].sync<<1)|(int)(chan[c.chan].active));
           break;
         case 6:
           filtControl&=7;
@@ -434,7 +434,7 @@ int DivPlatformC64::dispatch(DivCommand c) {
 
 void DivPlatformC64::muteChannel(int ch, bool mute) {
   isMuted[ch]=mute;
-  rWrite(ch*7+4,(isMuted[ch]?8:(chan[ch].wave<<4))|(chan[ch].ring<<2)|(chan[ch].sync<<1)|chan[ch].active);
+  rWrite(ch*7+4,(isMuted[ch]?8:(chan[ch].wave<<4))|(chan[ch].ring<<2)|(chan[ch].sync<<1)|(int)(chan[ch].active));
 }
 
 void DivPlatformC64::forceIns() {
diff --git a/src/engine/platform/mmc5.cpp b/src/engine/platform/mmc5.cpp
index 0f803ee2..79d9fc61 100644
--- a/src/engine/platform/mmc5.cpp
+++ b/src/engine/platform/mmc5.cpp
@@ -89,7 +89,6 @@ void DivPlatformMMC5::acquire(short* bufL, short* bufR, size_t start, size_t len
     if (!isMuted[2]) {
       sample+=mmc5->pcm.output*2;
     }
-    sample=(sample-128)<<6;
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
     bufL[i]=sample;
@@ -336,6 +335,10 @@ int DivPlatformMMC5::getRegisterPoolSize() {
   return 32;
 }
 
+float DivPlatformMMC5::getPostAmp() {
+  return 64.0f;
+}
+
 void DivPlatformMMC5::reset() {
   for (int i=0; i<3; i++) {
     chan[i]=DivPlatformMMC5::Channel();
diff --git a/src/engine/platform/mmc5.h b/src/engine/platform/mmc5.h
index a29ffc7d..6b364d5a 100644
--- a/src/engine/platform/mmc5.h
+++ b/src/engine/platform/mmc5.h
@@ -74,6 +74,7 @@ class DivPlatformMMC5: public DivDispatch {
     void tick();
     void muteChannel(int ch, bool mute);
     bool keyOffAffectsArp(int ch);
+    float getPostAmp();
     void setFlags(unsigned int flags);
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index 5380b0b4..9f56e4e5 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -80,7 +80,14 @@ void DivPlatformNES::acquire(short* bufL, short* bufR, size_t start, size_t len)
         DivSample* s=parent->getSample(dacSample);
         if (s->samples>0) {
           if (!isMuted[4]) {
-            rWrite(0x4011,((unsigned char)s->data8[dacPos]+0x80)>>1);
+            unsigned char next=((unsigned char)s->data8[dacPos]+0x80)>>1;
+            if (dacAntiClickOn && dacAntiClick<next) {
+              dacAntiClick+=8;
+              rWrite(0x4011,dacAntiClick);
+            } else {
+              dacAntiClickOn=false;
+              rWrite(0x4011,next);
+            }
           }
           if (++dacPos>=s->samples) {
             if (s->loopStart>=0 && s->loopStart<(int)s->samples) {
@@ -101,7 +108,7 @@ void DivPlatformNES::acquire(short* bufL, short* bufR, size_t start, size_t len)
     if (nes->apu.clocked) {
       nes->apu.clocked=false;
     }
-    int sample=(pulse_output(nes)+tnd_output(nes)-128)<<7;
+    int sample=(pulse_output(nes)+tnd_output(nes));
     if (sample>32767) sample=32767;
     if (sample<-32768) sample=-32768;
     bufL[i]=sample;
@@ -454,6 +461,10 @@ int DivPlatformNES::getRegisterPoolSize() {
   return 32;
 }
 
+float DivPlatformNES::getPostAmp() {
+  return 128.0f;
+}
+
 void DivPlatformNES::reset() {
   for (int i=0; i<5; i++) {
     chan[i]=DivPlatformNES::Channel();
@@ -476,6 +487,9 @@ void DivPlatformNES::reset() {
   rWrite(0x4015,0x1f);
   rWrite(0x4001,chan[0].sweep);
   rWrite(0x4005,chan[1].sweep);
+
+  dacAntiClickOn=true;
+  dacAntiClick=0;
 }
 
 bool DivPlatformNES::keyOffAffectsArp(int ch) {
diff --git a/src/engine/platform/nes.h b/src/engine/platform/nes.h
index c1b699bc..1dbb4411 100644
--- a/src/engine/platform/nes.h
+++ b/src/engine/platform/nes.h
@@ -54,10 +54,11 @@ class DivPlatformNES: public DivDispatch {
   Channel chan[5];
   bool isMuted[5];
   int dacPeriod, dacRate;
-  unsigned int dacPos;
+  unsigned int dacPos, dacAntiClick;
   int dacSample;
   unsigned char sampleBank;
   unsigned char apuType;
+  bool dacAntiClickOn;
   struct NESAPU* nes;
   unsigned char regPool[128];
 
@@ -74,6 +75,7 @@ class DivPlatformNES: public DivDispatch {
     void tick();
     void muteChannel(int ch, bool mute);
     bool keyOffAffectsArp(int ch);
+    float getPostAmp();
     void setFlags(unsigned int flags);
     void notifyInsDeletion(void* ins);
     void poke(unsigned int addr, unsigned short val);
diff --git a/src/engine/platform/opl.cpp b/src/engine/platform/opl.cpp
index 6b4db8c6..040c8035 100644
--- a/src/engine/platform/opl.cpp
+++ b/src/engine/platform/opl.cpp
@@ -371,7 +371,7 @@ void DivPlatformOPL::tick() {
   if (update4OpMask) {
     update4OpMask=false;
     if (oplType==3) {
-      unsigned char opMask=chan[0].fourOp|(chan[2].fourOp<<1)|(chan[4].fourOp<<2)|(chan[6].fourOp<<3)|(chan[8].fourOp<<4)|(chan[10].fourOp<<5);
+      unsigned char opMask=(int)(chan[0].fourOp)|(chan[2].fourOp<<1)|(chan[4].fourOp<<2)|(chan[6].fourOp<<3)|(chan[8].fourOp<<4)|(chan[10].fourOp<<5);
       immWrite(0x104,opMask);
       //printf("updating opMask to %.2x\n",opMask);
     }
diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index 2c23639b..ee07463c 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -620,7 +620,7 @@ int DivPlatformOPLL::dispatch(DivCommand c) {
     }
     case DIV_CMD_FM_EXTCH:
       if (!properDrumsSys) break;
-      if (properDrums==c.value) break;
+      if ((int)properDrums==c.value) break;
       if (c.value) {
         properDrums=true;
         immWrite(0x0e,0x20);
diff --git a/src/engine/platform/saa.cpp b/src/engine/platform/saa.cpp
index db614ee7..708fbc7a 100644
--- a/src/engine/platform/saa.cpp
+++ b/src/engine/platform/saa.cpp
@@ -414,6 +414,16 @@ void DivPlatformSAA1099::reset() {
 
   extMode=false;
 
+  rWrite(8,255);
+  rWrite(9,255);
+  rWrite(10,255);
+  rWrite(11,255);
+  rWrite(12,255);
+  rWrite(13,255);
+  rWrite(16,0x77);
+  rWrite(17,0x77);
+  rWrite(18,0x77);
+  rWrite(0x1c,2);
   rWrite(0x1c,1);
 }
 
diff --git a/src/engine/platform/sound/ay8910.cpp b/src/engine/platform/sound/ay8910.cpp
index 2d734f93..8bb38788 100644
--- a/src/engine/platform/sound/ay8910.cpp
+++ b/src/engine/platform/sound/ay8910.cpp
@@ -1120,7 +1120,7 @@ void ay8910_device::sound_stream_update(short** outputs, int outLen)
 		for (int chan = 0; chan < NUM_CHANNELS; chan++)
 		{
 			tone = &m_tone[chan];
-			m_vol_enabled[chan] = (tone->output | tone_enable(chan)) & (noise_output() | noise_enable(chan));
+			m_vol_enabled[chan] = (tone->output | (unsigned char)tone_enable(chan)) & (noise_output() | (unsigned char)noise_enable(chan));
 		}
 
 		/* update envelope */
diff --git a/src/engine/platform/sound/nes/apu.c b/src/engine/platform/sound/nes/apu.c
index 8d53e583..9e177a78 100644
--- a/src/engine/platform/sound/nes/apu.c
+++ b/src/engine/platform/sound/nes/apu.c
@@ -213,7 +213,8 @@ void apu_turn_on(struct NESAPU* a, BYTE apu_type) {
 	a->S2.sweep.delay = 1;
 	a->S2.sweep.divider = 1;
 	a->TR.frequency = 1;
-	a->TR.sequencer = 0;
+  /* questo era 0 ma produce click nell'audio */
+	a->TR.sequencer = 7;
 	a->NS.frequency = 1;
 	a->NS.shift = 1;
 	a->DMC.frequency = 1;
diff --git a/src/engine/platform/sound/ymfm/ymfm.h b/src/engine/platform/sound/ymfm/ymfm.h
index 906e3211..7b98f849 100644
--- a/src/engine/platform/sound/ymfm/ymfm.h
+++ b/src/engine/platform/sound/ymfm/ymfm.h
@@ -33,7 +33,7 @@
 
 #pragma once
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
  #define _CRT_SECURE_NO_WARNINGS
 #endif
 
diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index 8e1f1d66..0118acc4 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -17,9 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "blip_buf.h"
-#include "song.h"
-#include "wavetable.h"
 #define _USE_MATH_DEFINES
 #include "dispatch.h"
 #include "engine.h"
@@ -201,16 +198,24 @@ int DivEngine::dispatchCmd(DivCommand c) {
           chan[c.chan].curMidiNote=-1;
           break;
         case DIV_CMD_INSTRUMENT:
-          output->midiOut->send(TAMidiMessage(0xc0|(c.chan&15),c.value,0));
+          if (chan[c.chan].lastIns!=c.value) {
+            output->midiOut->send(TAMidiMessage(0xc0|(c.chan&15),c.value,0));
+          }
           break;
         case DIV_CMD_VOLUME:
-          //output->midiOut->send(TAMidiMessage(0xb0|(c.chan&15),0x07,scaledVol));
+          if (chan[c.chan].curMidiNote>=0 && chan[c.chan].midiAftertouch) {
+            chan[c.chan].midiAftertouch=false;
+            output->midiOut->send(TAMidiMessage(0xa0|(c.chan&15),chan[c.chan].curMidiNote,scaledVol));
+          }
           break;
         case DIV_CMD_PITCH: {
           int pitchBend=8192+(c.value<<5);
           if (pitchBend<0) pitchBend=0;
           if (pitchBend>16383) pitchBend=16383;
-          output->midiOut->send(TAMidiMessage(0xe0|(c.chan&15),pitchBend&0x7f,pitchBend>>7));
+          if (pitchBend!=chan[c.chan].midiPitch) {
+            chan[c.chan].midiPitch=pitchBend;
+            output->midiOut->send(TAMidiMessage(0xe0|(c.chan&15),pitchBend&0x7f,pitchBend>>7));
+          }
           break;
         }
         default:
@@ -963,6 +968,9 @@ void DivEngine::processRow(int i, bool afterDelay) {
   // volume
   if (pat->data[whatRow][3]!=-1) {
     if (dispatchCmd(DivCommand(DIV_ALWAYS_SET_VOLUME,i)) || (MIN(chan[i].volMax,chan[i].volume)>>8)!=pat->data[whatRow][3]) {
+      if (pat->data[whatRow][0]==0 && pat->data[whatRow][1]==0) {
+        chan[i].midiAftertouch=true;
+      }
       chan[i].volume=pat->data[whatRow][3]<<8;
       dispatchCmd(DivCommand(DIV_CMD_VOLUME,i,chan[i].volume>>8));
     }
@@ -1436,6 +1444,11 @@ bool DivEngine::nextTick(bool noAccum) {
     cycles++;
   }
 
+  // MIDI clock
+  if (output) if (!skipping && output->midiOut!=NULL) {
+    output->midiOut->send(TAMidiMessage(TA_MIDI_CLOCK,0,0));
+  }
+
   while (!pendingNotes.empty()) {
     DivNoteEvent& note=pendingNotes.front();
     if (note.on) {
@@ -1732,8 +1745,11 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
 
   if (!playing) {
     if (out!=NULL) {
-      memcpy(oscBuf[0],out[0],size*sizeof(float));
-      memcpy(oscBuf[1],out[1],size*sizeof(float));
+      for (unsigned int i=0; i<size; i++) {
+        oscBuf[0][oscWritePos]=out[0][i];
+        oscBuf[1][oscWritePos]=out[1][i];
+        if (++oscWritePos>=32768) oscWritePos=0;
+      }
       oscSize=size;
     }
     isBusy.unlock();
@@ -1847,6 +1863,8 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
   for (int i=0; i<song.systemLen; i++) {
     float volL=((float)song.systemVol[i]/64.0f)*((float)MIN(127,127-(int)song.systemPan[i])/127.0f)*song.masterVol;
     float volR=((float)song.systemVol[i]/64.0f)*((float)MIN(127,127+(int)song.systemPan[i])/127.0f)*song.masterVol;
+    volL*=disCont[i].dispatch->getPostAmp();
+    volR*=disCont[i].dispatch->getPostAmp();
     if (disCont[i].dispatch->isStereo()) {
       for (size_t j=0; j<size; j++) {
         out[0][j]+=((float)disCont[i].bbOut[0][j]/32768.0)*volL;
@@ -1880,8 +1898,11 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
     while (metroPos>=1) metroPos--;
   }
 
-  memcpy(oscBuf[0],out[0],size*sizeof(float));
-  memcpy(oscBuf[1],out[1],size*sizeof(float));
+  for (unsigned int i=0; i<size; i++) {
+    oscBuf[0][oscWritePos]=out[0][i];
+    oscBuf[1][oscWritePos]=out[1][i];
+    if (++oscWritePos>=32768) oscWritePos=0;
+  }
   oscSize=size;
 
   if (forceMono) {
diff --git a/src/engine/safeReader.cpp b/src/engine/safeReader.cpp
index f27e9044..9add1b5a 100644
--- a/src/engine/safeReader.cpp
+++ b/src/engine/safeReader.cpp
@@ -66,42 +66,6 @@ int SafeReader::read(void* where, size_t count) {
   return count;
 }
 
-template<typename T>
-int SafeReader::readByte(T* where, size_t count, unsigned char byte, Endianness endianness) {
-  if (byte==sizeof(T)) {
-    return read(where,count*byte);
-  } else {
-#ifdef READ_DEBUG
-    logD("SR: reading %d x %d bit words at %x\n",count,byte<<3,curSeek);
-#endif
-    if (count==0) return 0;
-    if (curSeek+(count*byte)>len) throw EndOfFileException(this,len);
-    int start,end,inc;
-    switch (endianness) {
-      case BigEndian:
-        start=byte-1;
-        end=-1;
-        inc=-1;
-        break;
-      case LittleEndian:
-      default:
-        start=0;
-        end=byte;
-        inc=1;
-        break;
-    }
-    for (int c=0; c<count; c++) {
-      T temp=0;
-      for (int b=start; b!=end; b+=inc) {
-        temp|=(buf[curSeek++]&0xff)<<(b<<3);
-      }
-      *where++=temp;
-    }
-    count*=byte;
-  }
-  return count;
-}
-
 signed char SafeReader::readC() {
 #ifdef READ_DEBUG
   logD("SR: reading char %x:\n",curSeek);
diff --git a/src/engine/safeReader.h b/src/engine/safeReader.h
index 7bf7d7d2..f674f592 100644
--- a/src/engine/safeReader.h
+++ b/src/engine/safeReader.h
@@ -51,7 +51,6 @@ class SafeReader {
     size_t size();
 
     int read(void* where, size_t count);
-    template<typename T> int readByte(T* where, size_t count, unsigned char byte=sizeof(T), Endianness endianness=LittleEndian);
 
     // these functions may throw EndOfFileException.
     signed char readC();
diff --git a/src/engine/safeWriter.cpp b/src/engine/safeWriter.cpp
index 2e8fb7dd..f29800a4 100644
--- a/src/engine/safeWriter.cpp
+++ b/src/engine/safeWriter.cpp
@@ -73,39 +73,6 @@ int SafeWriter::write(const void* what, size_t count) {
   return count;
 }
 
-template<typename T>
-int SafeWriter::writeByte(T* what, size_t count, unsigned char byte, Endianness endianness) {
-  if (byte==sizeof(T)) {
-    return write(what,count*byte);
-  } else {
-    if (!operative) return 0;
-    checkSize(count*byte);
-    int start,end,inc;
-    switch (endianness) {
-      case BigEndian:
-        start=byte-1;
-        end=-1;
-        inc=-1;
-        break;
-      case LittleEndian:
-      default:
-        start=0;
-        end=byte;
-        inc=1;
-        break;
-    }
-    for (int c=0; c<count; c++) {
-      T temp=*what++;
-      for (int b=start; b!=end; b+=inc) {
-        buf[curSeek++]=(temp>>(byte<<3))&0xff;
-      }
-    }
-    count*=byte;
-    if (curSeek>len) len=curSeek;
-  }
-  return count;
-}
-
 int SafeWriter::writeC(signed char val) {
   return write(&val,1);
 }
diff --git a/src/engine/safeWriter.h b/src/engine/safeWriter.h
index c4920378..9072c61d 100644
--- a/src/engine/safeWriter.h
+++ b/src/engine/safeWriter.h
@@ -43,7 +43,6 @@ class SafeWriter {
     size_t size();
 
     int write(const void* what, size_t count);
-    template<typename T> int writeByte(T* what, size_t count, unsigned char byte=sizeof(T), Endianness endianness=LittleEndian);
 
     int writeC(signed char val);
     int writeS(short val);
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 755b825a..66930051 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -2600,6 +2600,9 @@ bool FurnaceGUI::loop() {
     drawInsList();
     drawInsEdit();
     drawMixer();
+
+    readOsc();
+
     drawOsc();
     drawVolMeter();
     drawSettings();
@@ -3428,7 +3431,10 @@ FurnaceGUI::FurnaceGUI():
   openSampleResampleOpt(false),
   openSampleAmplifyOpt(false),
   openSampleSilenceOpt(false),
-  openSampleFilterOpt(false) {
+  openSampleFilterOpt(false),
+  oscTotal(0),
+  oscZoom(0.5f),
+  oscZoomSlider(false) {
   // value keys
   valueKeys[SDLK_0]=0;
   valueKeys[SDLK_1]=1;
@@ -3469,4 +3475,5 @@ FurnaceGUI::FurnaceGUI():
   memset(patChanX,0,sizeof(float)*(DIV_MAX_CHANS+1));
   memset(patChanSlideY,0,sizeof(float)*(DIV_MAX_CHANS+1));
   memset(lastIns,-1,sizeof(int)*DIV_MAX_CHANS);
+  memset(oscValues,0,sizeof(float)*512);
 }
diff --git a/src/gui/gui.h b/src/gui/gui.h
index a797700f..641cf7c0 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -71,6 +71,16 @@ enum FurnaceGUIColors {
   GUI_COLOR_FILE_FONT,
   GUI_COLOR_FILE_OTHER,
 
+  GUI_COLOR_OSC_BG1,
+  GUI_COLOR_OSC_BG2,
+  GUI_COLOR_OSC_BG3,
+  GUI_COLOR_OSC_BG4,
+  GUI_COLOR_OSC_BORDER,
+  GUI_COLOR_OSC_WAVE,
+  GUI_COLOR_OSC_WAVE_PEAK,
+  GUI_COLOR_OSC_REF,
+  GUI_COLOR_OSC_GUIDE,
+
   GUI_COLOR_VOLMETER_LOW,
   GUI_COLOR_VOLMETER_HIGH,
   GUI_COLOR_VOLMETER_PEAK,
@@ -976,6 +986,12 @@ class FurnaceGUI {
   size_t sampleClipboardLen;
   bool openSampleResizeOpt, openSampleResampleOpt, openSampleAmplifyOpt, openSampleSilenceOpt, openSampleFilterOpt;
 
+  // oscilloscope
+  int oscTotal;
+  float oscValues[512];
+  float oscZoom;
+  bool oscZoomSlider;
+
   // visualizer
   float keyHit[DIV_MAX_CHANS];
   int lastIns[DIV_MAX_CHANS];
@@ -996,6 +1012,8 @@ class FurnaceGUI {
   void updateWindowTitle();
   void prepareLayout();
 
+  void readOsc();
+
   float calcBPM(int s1, int s2, float hz);
 
   void patternRow(int i, bool isPlaying, float lineHeight, int chans, int ord, const DivPattern** patCache);
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index 08582933..c3a7c72b 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -377,6 +377,16 @@ const FurnaceGUIColorDef guiColors[GUI_COLOR_MAX]={
   D(GUI_COLOR_FILE_FONT,"",ImVec4(0.3f,1.0f,0.6f,1.0f)),
   D(GUI_COLOR_FILE_OTHER,"",ImVec4(0.7f,0.7f,0.7f,1.0f)),
 
+  D(GUI_COLOR_OSC_BG1,"",ImVec4(0.1f,0.18f,0.3f,1.0f)),
+  D(GUI_COLOR_OSC_BG2,"",ImVec4(0.1f,0.18f,0.3f,1.0f)),
+  D(GUI_COLOR_OSC_BG3,"",ImVec4(0.05f,0.15f,0.25f,1.0f)),
+  D(GUI_COLOR_OSC_BG4,"",ImVec4(0.05f,0.15f,0.25f,1.0f)),
+  D(GUI_COLOR_OSC_BORDER,"",ImVec4(0.4f,0.6f,0.95f,1.0f)),
+  D(GUI_COLOR_OSC_WAVE,"",ImVec4(0.95f,0.95f,1.0f,1.0f)),
+  D(GUI_COLOR_OSC_WAVE_PEAK,"",ImVec4(0.95f,0.95f,1.0f,1.0f)),
+  D(GUI_COLOR_OSC_REF,"",ImVec4(0.3f,0.3f,0.3f,1.0f)),
+  D(GUI_COLOR_OSC_GUIDE,"",ImVec4(0.3,0.3f,0.3f,1.0f)),
+
   D(GUI_COLOR_VOLMETER_LOW,"",ImVec4(0.2f,0.6f,0.2f,1.0f)),
   D(GUI_COLOR_VOLMETER_HIGH,"",ImVec4(1.0f,0.9f,0.2f,1.0f)),
   D(GUI_COLOR_VOLMETER_PEAK,"",ImVec4(1.0f,0.1f,0.1f,1.0f)),
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index 1f5d9e91..75e0cdd8 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -1068,7 +1068,7 @@ void FurnaceGUI::drawFMEnv(unsigned char tl, unsigned char ar, unsigned char dr,
     } \
     ImGui::SetNextItemWidth(availableWidth); \
     if (ImGui::InputText("##IMacroMML_" macroName,&mmlStr)) { \
-      decodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,macroAMin,(bitfield)?((1<<macroAMax)-1):macroAMax,macro.rel); \
+      decodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,macroAMin,(bitfield)?((1<<(bitfield?macroAMax:0))-1):macroAMax,macro.rel); \
     } \
     if (!ImGui::IsItemActive()) { \
       encodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,macro.rel); \
@@ -1081,12 +1081,12 @@ void FurnaceGUI::drawFMEnv(unsigned char tl, unsigned char ar, unsigned char dr,
   ImGui::TableNextColumn(); \
   ImGui::Text("%s",displayName); \
   ImGui::SameLine(); \
-  if (ImGui::SmallButton(displayLoop?(ICON_FA_CHEVRON_UP "##IOPMacro.open_" macroName):(ICON_FA_CHEVRON_DOWN "##IOPMacro.open_" macroName))) { \
+  if (ImGui::SmallButton(displayLoop?(ICON_FA_CHEVRON_UP "##IOPMacroOpen_" macroName):(ICON_FA_CHEVRON_DOWN "##IOPMacroOpen_" macroName))) { \
     displayLoop=!displayLoop; \
   } \
   if (displayLoop) { \
     ImGui::SetNextItemWidth(lenAvail); \
-    if (ImGui::InputScalar("##IOPMacro.len_" #op macroName,ImGuiDataType_U8,&macro.len,&_ONE,&_THREE)) { MARK_MODIFIED \
+    if (ImGui::InputScalar("##IOPMacroLen_" #op macroName,ImGuiDataType_U8,&macro.len,&_ONE,&_THREE)) { MARK_MODIFIED \
       if (macro.len>127) macro.len=127; \
     } \
     if (macroMode) { \
@@ -1146,7 +1146,7 @@ void FurnaceGUI::drawFMEnv(unsigned char tl, unsigned char ar, unsigned char dr,
     processDrags(ImGui::GetMousePos().x,ImGui::GetMousePos().y); \
   } \
   if (displayLoop) { \
-    PlotCustom("##IOPMacro.loop_" #op macroName,loopIndicator,totalFit,macroDragScroll,NULL,0,2,ImVec2(availableWidth,12.0f*dpiScale),sizeof(float),uiColors[GUI_COLOR_MACRO_OTHER],macro.len-macroDragScroll,&macroHoverLoop); \
+    PlotCustom("##IOPMacroLoop_" #op macroName,loopIndicator,totalFit,macroDragScroll,NULL,0,2,ImVec2(availableWidth,12.0f*dpiScale),sizeof(float),uiColors[GUI_COLOR_MACRO_OTHER],macro.len-macroDragScroll,&macroHoverLoop); \
     if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) { \
       macroLoopDragStart=ImGui::GetItemRectMin(); \
       macroLoopDragAreaSize=ImVec2(availableWidth,8.0f*dpiScale); \
@@ -1168,7 +1168,7 @@ void FurnaceGUI::drawFMEnv(unsigned char tl, unsigned char ar, unsigned char dr,
     } \
     ImGui::SetNextItemWidth(availableWidth); \
     if (ImGui::InputText("##IOPMacroMML_" macroName,&mmlStr)) { \
-      decodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,0,bitfield?((1<<macroHeight)-1):(macroHeight),macro.rel); \
+      decodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,0,bitfield?((1<<(bitfield?macroHeight:0))-1):(macroHeight),macro.rel); \
     } \
     if (!ImGui::IsItemActive()) { \
       encodeMMLStr(mmlStr,macro.val,macro.len,macro.loop,macro.rel); \
diff --git a/src/gui/osc.cpp b/src/gui/osc.cpp
index 0bdcdf8a..9a1c6aff 100644
--- a/src/gui/osc.cpp
+++ b/src/gui/osc.cpp
@@ -18,6 +18,52 @@
  */
 
 #include "gui.h"
+#include "imgui_internal.h"
+#include <imgui.h>
+#include <math.h>
+
+void FurnaceGUI::readOsc() {
+  int writePos=e->oscWritePos;
+  int readPos=e->oscReadPos;
+  int avail=0;
+  int total=0;
+  if (writePos>=readPos) {
+    avail=writePos-readPos;
+  } else {
+    avail=writePos-readPos+32768;
+  }
+  if (oscTotal==0) {
+    oscTotal=ImGui::GetIO().DeltaTime*e->getAudioDescGot().rate;
+  } else {
+    oscTotal=(oscTotal+(int)round(ImGui::GetIO().DeltaTime*e->getAudioDescGot().rate))>>1;
+  }
+  int bias=avail-oscTotal-e->getAudioDescGot().bufsize;
+  if (bias<0) bias=0;
+  total=oscTotal+(bias>>6);
+  if (total>avail) total=avail;
+  //printf("total: %d. avail: %d bias: %d\n",total,avail,bias);
+  for (int i=0; i<512; i++) {
+    int pos=(readPos+(i*total/512))&0x7fff;
+    oscValues[i]=(e->oscBuf[0][pos]+e->oscBuf[1][pos])*0.5f;
+  }
+
+  float peakDecay=0.05f*60.0f*ImGui::GetIO().DeltaTime;
+  for (int i=0; i<2; i++) {
+    peak[i]*=1.0-peakDecay;
+    if (peak[i]<0.0001) peak[i]=0.0;
+    float newPeak=peak[i];
+    for (int j=0; j<total; j++) {
+      int pos=(readPos+j)&0x7fff;
+      if (fabs(e->oscBuf[i][pos])>newPeak) {
+        newPeak=fabs(e->oscBuf[i][pos]);
+      }
+    }
+    peak[i]+=(newPeak-peak[i])*0.9;
+  }
+
+  readPos=(readPos+total)&0x7fff;
+  e->oscReadPos=readPos;
+}
 
 void FurnaceGUI::drawOsc() {
   if (nextWindow==GUI_WINDOW_OSCILLOSCOPE) {
@@ -27,21 +73,106 @@ void FurnaceGUI::drawOsc() {
   }
   if (!oscOpen) return;
   ImGui::SetNextWindowSizeConstraints(ImVec2(64.0f*dpiScale,32.0f*dpiScale),ImVec2(scrW*dpiScale,scrH*dpiScale));
-  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding,ImVec2(0,0));
+  /*ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding,ImVec2(0,0));
   ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing,ImVec2(0,0));
-  ImGui::PushStyleVar(ImGuiStyleVar_ItemInnerSpacing,ImVec2(0,0));
+  ImGui::PushStyleVar(ImGuiStyleVar_ItemInnerSpacing,ImVec2(0,0));*/
   if (ImGui::Begin("Oscilloscope",&oscOpen)) {
-    float values[512];
-    for (int i=0; i<512; i++) {
-      int pos=i*e->oscSize/512;
-      values[i]=(e->oscBuf[0][pos]+e->oscBuf[1][pos])*0.5f;
+    if (oscZoomSlider) {
+      if (ImGui::VSliderFloat("##OscZoom",ImVec2(20.0f*dpiScale,ImGui::GetContentRegionAvail().y),&oscZoom,0.5,2.0)) {
+        if (oscZoom<0.5) oscZoom=0.5;
+        if (oscZoom>2.0) oscZoom=2.0;
+      }
+      ImGui::SameLine();
+    }
+
+    ImDrawList* dl=ImGui::GetWindowDrawList();
+    ImGuiWindow* window=ImGui::GetCurrentWindow();
+
+    ImVec2 waveform[512];
+    ImVec2 size=ImGui::GetContentRegionAvail();
+
+    ImVec2 minArea=window->DC.CursorPos;
+    ImVec2 maxArea=ImVec2(
+      minArea.x+size.x,
+      minArea.y+size.y
+    );
+    ImRect rect=ImRect(minArea,maxArea);
+    ImRect inRect=rect;
+    inRect.Min.x+=dpiScale;
+    inRect.Min.y+=dpiScale;
+    inRect.Max.x-=dpiScale;
+    inRect.Max.y-=dpiScale;
+    ImGuiStyle& style=ImGui::GetStyle();
+    ImU32 color=ImGui::GetColorU32(isClipping?uiColors[GUI_COLOR_OSC_WAVE_PEAK]:uiColors[GUI_COLOR_OSC_WAVE]);
+    ImU32 borderColor=ImGui::GetColorU32(uiColors[GUI_COLOR_OSC_BORDER]);
+    ImU32 refColor=ImGui::GetColorU32(uiColors[GUI_COLOR_OSC_REF]);
+    ImGui::ItemSize(size,style.FramePadding.y);
+    if (ImGui::ItemAdd(rect,ImGui::GetID("wsDisplay"))) {
+      // https://github.com/ocornut/imgui/issues/3710
+      const int v0 = dl->VtxBuffer.Size;
+      dl->AddRectFilled(inRect.Min,inRect.Max,0xffffffff,8.0f*dpiScale);
+      const int v1 = dl->VtxBuffer.Size;
+
+      for (int i=v0; i<v1; i++) {
+        ImDrawVert* v=&dl->VtxBuffer.Data[i];
+        ImVec4 col0=uiColors[GUI_COLOR_OSC_BG1];
+        ImVec4 col1=uiColors[GUI_COLOR_OSC_BG3];
+        ImVec4 col2=uiColors[GUI_COLOR_OSC_BG2];
+        ImVec4 col3=uiColors[GUI_COLOR_OSC_BG4];
+        
+        float shadeX=(v->pos.x-rect.Min.x)/(rect.Max.x-rect.Min.x);
+        float shadeY=(v->pos.y-rect.Min.y)/(rect.Max.y-rect.Min.y);
+        if (shadeX<0.0f) shadeX=0.0f;
+        if (shadeX>1.0f) shadeX=1.0f;
+        if (shadeY<0.0f) shadeY=0.0f;
+        if (shadeY>1.0f) shadeY=1.0f;
+
+        col0.x+=(col2.x-col0.x)*shadeX;
+        col0.y+=(col2.y-col0.y)*shadeX;
+        col0.z+=(col2.z-col0.z)*shadeX;
+        col0.w+=(col2.w-col0.w)*shadeX;
+
+        col1.x+=(col3.x-col1.x)*shadeX;
+        col1.y+=(col3.y-col1.y)*shadeX;
+        col1.z+=(col3.z-col1.z)*shadeX;
+        col1.w+=(col3.w-col1.w)*shadeX;
+
+        col0.x+=(col1.x-col0.x)*shadeY;
+        col0.y+=(col1.y-col0.y)*shadeY;
+        col0.z+=(col1.z-col0.z)*shadeY;
+        col0.w+=(col1.w-col0.w)*shadeY;
+
+        ImVec4 conv=ImGui::ColorConvertU32ToFloat4(v->col);
+        col0.x*=conv.x;
+        col0.y*=conv.y;
+        col0.z*=conv.z;
+        col0.w*=conv.w;
+
+        v->col=ImGui::ColorConvertFloat4ToU32(col0);
+      }
+
+      dl->AddLine(
+        ImLerp(rect.Min,rect.Max,ImVec2(0.0f,0.5f)),
+        ImLerp(rect.Min,rect.Max,ImVec2(0.0f,0.5f)),
+        refColor,
+        dpiScale
+      );
+
+      for (size_t i=0; i<512; i++) {
+        float x=(float)i/512.0f;
+        float y=oscValues[i]*oscZoom;
+        if (y<-0.5f) y=-0.5f;
+        if (y>0.5f) y=0.5f;
+        waveform[i]=ImLerp(rect.Min,rect.Max,ImVec2(x,0.5f-y));
+      }
+      dl->AddPolyline(waveform,512,color,ImDrawFlags_None,dpiScale);
+      dl->AddRect(rect.Min,rect.Max,borderColor,8.0f*dpiScale,0,2.0f*dpiScale);
+    }
+    if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
+      oscZoomSlider=!oscZoomSlider;
     }
-    //ImGui::SetCursorPos(ImVec2(0,0));
-    ImGui::BeginDisabled();
-    ImGui::PlotLines("##SingleOsc",values,512,0,NULL,-1.0f,1.0f,ImGui::GetContentRegionAvail());
-    ImGui::EndDisabled();
   }
-  ImGui::PopStyleVar(3);
+  //ImGui::PopStyleVar(3);
   if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_OSCILLOSCOPE;
   ImGui::End();
-}
\ No newline at end of file
+}
diff --git a/src/gui/pattern.cpp b/src/gui/pattern.cpp
index d4bf904b..d56196d6 100644
--- a/src/gui/pattern.cpp
+++ b/src/gui/pattern.cpp
@@ -17,8 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include <SDL_timer.h>
-#include <imgui.h>
 #define _USE_MATH_DEFINES
 #include "gui.h"
 #include "../ta-log.h"
@@ -284,27 +282,33 @@ inline void FurnaceGUI::patternRow(int i, bool isPlaying, float lineHeight, int
           sprintf(id,"..##PE%d_%d_%d",k,i,j);
           ImGui::PushStyleColor(ImGuiCol_Text,inactiveColor);
         } else {
-          sprintf(id,"%.2X##PE%d_%d_%d",pat->data[i][index],k,i,j);
-          if (pat->data[i][index]<0x10) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[fxColors[pat->data[i][index]]]);
-          } else if (pat->data[i][index]<0x20) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
-          } else if (pat->data[i][index]<0x30) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_SECONDARY]);
-          } else if (pat->data[i][index]<0x48) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
-          } else if (pat->data[i][index]<0x90) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
-          } else if (pat->data[i][index]<0xa0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_MISC]);
-          } else if (pat->data[i][index]<0xc0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
-          } else if (pat->data[i][index]<0xd0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SPEED]);
-          } else if (pat->data[i][index]<0xe0) {
+          if (pat->data[i][index]>0xff) {
+            sprintf(id,"??##PE%d_%d_%d",k,i,j);
             ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
           } else {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[extFxColors[pat->data[i][index]-0xe0]]);
+            const unsigned char data=pat->data[i][index];
+            sprintf(id,"%.2X##PE%d_%d_%d",data,k,i,j);
+            if (data<0x10) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[fxColors[data]]);
+            } else if (data<0x20) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
+            } else if (data<0x30) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_SECONDARY]);
+            } else if (data<0x48) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
+            } else if (data<0x90) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+            } else if (data<0xa0) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_MISC]);
+            } else if (data<0xc0) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+            } else if (data<0xd0) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SPEED]);
+            } else if (data<0xe0) {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+            } else {
+              ImGui::PushStyleColor(ImGuiCol_Text,uiColors[extFxColors[data-0xe0]]);
+            }
           }
         }
         ImGui::SameLine(0.0f,0.0f);
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 1cbd6a06..316e3ef5 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -942,6 +942,18 @@ void FurnaceGUI::drawSettings() {
             UI_COLOR_CONFIG(GUI_COLOR_FILE_OTHER,"Other");
             ImGui::TreePop();
           }
+          if (ImGui::TreeNode("Oscilloscope")) {
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_BORDER,"Border");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_BG1,"Background (top-left)");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_BG2,"Background (top-right)");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_BG3,"Background (bottom-left)");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_BG4,"Background (bottom-right)");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_WAVE,"Waveform");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_WAVE_PEAK,"Waveform (clip)");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_REF,"Reference");
+            UI_COLOR_CONFIG(GUI_COLOR_OSC_GUIDE,"Guide");
+            ImGui::TreePop();
+          }
           if (ImGui::TreeNode("Volume Meter")) {
             UI_COLOR_CONFIG(GUI_COLOR_VOLMETER_LOW,"Low");
             UI_COLOR_CONFIG(GUI_COLOR_VOLMETER_HIGH,"High");
diff --git a/src/gui/sysConf.cpp b/src/gui/sysConf.cpp
index 1bc60c7c..8ecf7c07 100644
--- a/src/gui/sysConf.cpp
+++ b/src/gui/sysConf.cpp
@@ -284,7 +284,7 @@ void FurnaceGUI::drawSysConf(int i) {
       }
       sysPal=flags&1;
       if (ImGui::Checkbox("PAL",&sysPal)) {
-        e->setSysFlags(i,(flags&(~1))|sysPal,restart);
+        e->setSysFlags(i,(flags&(~1))|(unsigned int)sysPal,restart);
         updateWindowTitle();
       }
       bool bypassLimits=flags&4;
@@ -395,4 +395,4 @@ void FurnaceGUI::drawSysConf(int i) {
       }
       break;
   }
-}
\ No newline at end of file
+}
diff --git a/src/gui/volMeter.cpp b/src/gui/volMeter.cpp
index 29f62c96..7be3464e 100644
--- a/src/gui/volMeter.cpp
+++ b/src/gui/volMeter.cpp
@@ -49,17 +49,9 @@ void FurnaceGUI::drawVolMeter() {
     ImGuiStyle& style=ImGui::GetStyle();
     ImGui::ItemSize(ImVec2(4.0f,4.0f),style.FramePadding.y);
     ImU32 lowColor=ImGui::GetColorU32(uiColors[GUI_COLOR_VOLMETER_LOW]);
-    float peakDecay=0.05f*60.0f*ImGui::GetIO().DeltaTime;
     if (ImGui::ItemAdd(rect,ImGui::GetID("volMeter"))) {
       ImGui::RenderFrame(rect.Min,rect.Max,ImGui::GetColorU32(ImGuiCol_FrameBg),true,style.FrameRounding);
       for (int i=0; i<2; i++) {
-        peak[i]*=1.0-peakDecay;
-        if (peak[i]<0.0001) peak[i]=0.0;
-        for (int j=0; j<e->oscSize; j++) {
-          if (fabs(e->oscBuf[i][j])>peak[i]) {
-            peak[i]=fabs(e->oscBuf[i][j]);
-          }
-        }
         float logPeak=(20*log10(peak[i])/36.0);
         if (logPeak==NAN) logPeak=0.0;
         if (logPeak<-1.0) logPeak=-1.0;