diff --git a/papers/newIns.md b/papers/newIns.md
index 341956c32..d301d27c2 100644
--- a/papers/newIns.md
+++ b/papers/newIns.md
@@ -150,6 +150,7 @@ the following feature codes are recognized:
 - `X1`: X1-010 ins data
 - `NE`: NES DPCM sample map data
 - `EF`: ESFM ins data
+- `PN`: PowerNoise ins data
 - `EN`: end of features
   - if you find this feature code, stop reading the instrument.
   - it will usually appear only when there sample/wave lists.
@@ -657,3 +658,11 @@ size | description
 
 if some fields are missing, that's because they are defined in the SM feature.
 NES instruments with DPCM sample maps have both SM and NE features.
+
+# PowerNoise data (PN)
+
+```
+size | description
+-----|------------------------------------
+  1  | octave
+```
diff --git a/src/engine/instrument.cpp b/src/engine/instrument.cpp
index 78e509046..990af8da3 100644
--- a/src/engine/instrument.cpp
+++ b/src/engine/instrument.cpp
@@ -253,6 +253,10 @@ bool DivInstrumentESFM::Operator::operator==(const DivInstrumentESFM::Operator&
   );
 }
 
+bool DivInstrumentPowerNoise::operator==(const DivInstrumentPowerNoise& other) {
+  return _C(octave);
+}
+
 #undef _C
 
 #define FEATURE_BEGIN(x) \
@@ -782,6 +786,14 @@ void DivInstrument::writeFeatureEF(SafeWriter* w) {
   FEATURE_END;
 }
 
+void DivInstrument::writeFeaturePN(SafeWriter* w) {
+  FEATURE_BEGIN("PN");
+
+  w->writeC(powernoise.octave);
+
+  FEATURE_END;
+}
+
 void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bool insName) {
   size_t blockStartSeek=0;
   size_t blockEndSeek=0;
@@ -826,6 +838,7 @@ void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bo
   bool featureX1=false;
   bool featureNE=false;
   bool featureEF=false;
+  bool featurePN=false;
 
   bool checkForWL=false;
 
@@ -1044,8 +1057,10 @@ void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bo
         featureEF=true;
         break;
       case DIV_INS_POWERNOISE:
+        featurePN=true;
         break;
       case DIV_INS_POWERNOISE_SLOPE:
+        featurePN=true;
         break;
       case DIV_INS_MAX:
         break;
@@ -1097,6 +1112,9 @@ void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bo
     if (esfm!=defaultIns.esfm) {
       featureEF=true;
     }
+    if (powernoise!=defaultIns.powernoise) {
+      featurePN=true;
+    }
   }
 
   // check ins name
@@ -1242,6 +1260,9 @@ void DivInstrument::putInsData2(SafeWriter* w, bool fui, const DivSong* song, bo
   if (featureEF) {
     writeFeatureEF(w);
   }
+  if (featurePN) {
+    writeFeaturePN(w);
+  }
 
   if (fui && (featureSL || featureWL)) {
     w->write("EN",2);
@@ -2677,6 +2698,14 @@ void DivInstrument::readFeatureEF(SafeReader& reader, short version) {
   READ_FEAT_END;
 }
 
+void DivInstrument::readFeaturePN(SafeReader& reader, short version) {
+  READ_FEAT_BEGIN;
+
+  powernoise.octave=reader.readC();
+
+  READ_FEAT_END;
+}
+
 DivDataErrors DivInstrument::readInsDataNew(SafeReader& reader, short version, bool fui, DivSong* song) {
   unsigned char featCode[2];
   bool volIsCutoff=false;
@@ -2747,6 +2776,8 @@ DivDataErrors DivInstrument::readInsDataNew(SafeReader& reader, short version, b
       readFeatureNE(reader,version);
     } else if (memcmp(featCode,"EF",2)==0) { // ESFM
       readFeatureEF(reader,version);
+    } else if (memcmp(featCode,"PN",2)==0) { // PowerNoise
+      readFeaturePN(reader,version);
     } else {
       if (song==NULL && (memcmp(featCode,"SL",2)==0 || (memcmp(featCode,"WL",2)==0))) {
         // nothing
diff --git a/src/engine/instrument.h b/src/engine/instrument.h
index d5d62c142..80bd8f251 100644
--- a/src/engine/instrument.h
+++ b/src/engine/instrument.h
@@ -824,6 +824,17 @@ struct DivInstrumentESFM {
     }
 };
 
+struct DivInstrumentPowerNoise {
+  unsigned char octave;
+
+  bool operator==(const DivInstrumentPowerNoise& other);
+  bool operator!=(const DivInstrumentPowerNoise& other) {
+    return !(*this==other);
+  }
+  DivInstrumentPowerNoise():
+    octave(0) {}
+};
+
 struct DivInstrument {
   String name;
   DivInstrumentType type;
@@ -841,6 +852,7 @@ struct DivInstrument {
   DivInstrumentES5506 es5506;
   DivInstrumentSNES snes;
   DivInstrumentESFM esfm;
+  DivInstrumentPowerNoise powernoise;
 
   /**
    * these are internal functions.
@@ -866,6 +878,7 @@ struct DivInstrument {
   void writeFeatureX1(SafeWriter* w);
   void writeFeatureNE(SafeWriter* w);
   void writeFeatureEF(SafeWriter* w);
+  void writeFeaturePN(SafeWriter* w);
 
   void readFeatureNA(SafeReader& reader, short version);
   void readFeatureFM(SafeReader& reader, short version);
@@ -887,6 +900,7 @@ struct DivInstrument {
   void readFeatureX1(SafeReader& reader, short version);
   void readFeatureNE(SafeReader& reader, short version);
   void readFeatureEF(SafeReader& reader, short version);
+  void readFeaturePN(SafeReader& reader, short version);
 
   DivDataErrors readInsDataOld(SafeReader& reader, short version);
   DivDataErrors readInsDataNew(SafeReader& reader, short version, bool fui, DivSong* song);