diff --git a/cwFlow.cpp b/cwFlow.cpp
index 8758b2b..4329d5e 100644
--- a/cwFlow.cpp
+++ b/cwFlow.cpp
@@ -58,7 +58,7 @@ namespace cw
       { "xfade_ctl",       &xfade_ctl::members },
       { "poly_voice_ctl",  &poly_voice_ctl::members },
       { "midi_voice",      &midi_voice::members },
-      { "piano_voice",     &piano_voice::members },
+      //{ "piano_voice",     &piano_voice::members },
       { "sample_hold",     &sample_hold::members },
       { "number",          &number::members },
       { "reg",             &reg::members },
diff --git a/cwFlowProc.cpp b/cwFlowProc.cpp
index 564468b..3a338ae 100644
--- a/cwFlowProc.cpp
+++ b/cwFlowProc.cpp
@@ -4443,7 +4443,7 @@ namespace cw
       };
       
     }    
-
+#ifdef NOT_DEF
     //------------------------------------------------------------------------------------------------------------------
     //
     // piano_voice
@@ -4786,7 +4786,7 @@ namespace cw
       };
       
     }    
-
+#endif
     
     //------------------------------------------------------------------------------------------------------------------
     //
diff --git a/cwFlowProc.h b/cwFlowProc.h
index 96aed14..922693b 100644
--- a/cwFlowProc.h
+++ b/cwFlowProc.h
@@ -30,7 +30,7 @@ namespace cw
     namespace audio_marker    { extern class_members_t members;  }
     namespace xfade_ctl       { extern class_members_t members;  }
     namespace midi_voice      { extern class_members_t members;  }
-    namespace piano_voice     { extern class_members_t members;  }
+    //namespace piano_voice     { extern class_members_t members;  }
     namespace poly_voice_ctl  { extern class_members_t members;  }
     namespace sample_hold     { extern class_members_t members;  }
     namespace number          { extern class_members_t members;  }