diff --git a/UI.cpp b/UI.cpp
index 9c878f2..7fa8218 100644
--- a/UI.cpp
+++ b/UI.cpp
@@ -371,9 +371,11 @@ void handle_ui(void)
                   else if (enc[i].read() > ENC_DELAY_VOLUME_STEPS)
                     enc[i].write(ENC_DELAY_VOLUME_STEPS);
                   effect_delay_volume = enc[i].read();
-                  mixer2.gain(0, 1.0-mapfloat(effect_delay_volume, 0, ENC_DELAY_VOLUME_STEPS, 0.0, 1.0)); // delay tap1 signal (with added feedback)
-                  mixer2.gain(1, mapfloat(effect_delay_volume, 0, ENC_DELAY_VOLUME_STEPS, 0.0, 1.0)); // delay tap1 signal (with added feedback)
-                  mixer2.gain(2, mapfloat(effect_delay_volume, 0, ENC_DELAY_VOLUME_STEPS, 0.0, 1.0)); // delay tap1 signal (with added feedback)
+                  float tmp_vol = mapfloat(effect_delay_volume, 0, ENC_DELAY_VOLUME_STEPS, 0.0, 1.0);
+                  //mixer2.gain(0, 1.0 - mapfloat(effect_delay_volume, 0, ENC_DELAY_VOLUME_STEPS, 0.0, 1.0)); // delay tap1 signal (with added feedback)
+                  mixer2.gain(0, 1.0 - tmp_vol); // delay tap1 signal (with added feedback)
+                  mixer2.gain(1, tmp_vol); // delay tap1 signal (with added feedback)
+                  mixer2.gain(2, tmp_vol); // delay tap1 signal
 #ifdef DEBUG
                   Serial.print(F("Setting delay volume to: "));
                   Serial.println(effect_delay_volume);
diff --git a/config.h b/config.h
index dd2d6db..12923fe 100644
--- a/config.h
+++ b/config.h
@@ -36,7 +36,7 @@
 #define MIDI_DEVICE Serial1
 #define USE_ONBOARD_USB_HOST 1
 #define MIDI_MERGE_THRU 1
-//#define TEENSY_AUDIO_BOARD 1
+#define TEENSY_AUDIO_BOARD 1
 #define VOLUME 0.6
 #define DEFAULT_MIDI_CHANNEL MIDI_CHANNEL_OMNI
 #define DEFAULT_SYSEXBANK 0