diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index ae939a2bd..eb6cff0dc 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -205,6 +205,9 @@ int DivPlatformGenesis::dispatch(DivCommand c) {
       break;
     }
     case DIV_CMD_NOTE_OFF:
+      if (c.chan==5) {
+        dacSample=-1;
+      }
       chan[c.chan].keyOff=true;
       chan[c.chan].active=false;
       break;
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index 691d20a95..53df12f24 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -187,6 +187,7 @@ int DivPlatformNES::dispatch(DivCommand c) {
       }
       break;
     case DIV_CMD_NOTE_OFF:
+      if (c.chan==4) dacSample=-1;
       chan[c.chan].active=false;
       chan[c.chan].keyOff=true;
       chan[c.chan].std.init(NULL);