diff --git a/MicroDexed.ino b/MicroDexed.ino
index 481de86..1830ac4 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -585,8 +585,8 @@ void setup()
   master_mixer_r.gain(2, 0.0);
   master_mixer_l.gain(2, 0.0);
 #endif
-  master_mixer_r.gain(3, 0.0);
-  master_mixer_l.gain(3, 0.0);
+  master_mixer_r.gain(3, 1.0); 
+  master_mixer_l.gain(3, 1.0);
 
 #if defined(TEENSY_AUDIO_BOARD) && defined(SGTL5000_AUDIO_THRU)
   audio_thru_mixer_r.gain(0, 1.0); // MD signal sum