diff --git a/dev/digital/Firmware_TEST/src/FIRMWARE.cpp b/dev/digital/Firmware_TEST/src/FIRMWARE.cpp
index 628c314..9015260 100644
--- a/dev/digital/Firmware_TEST/src/FIRMWARE.cpp
+++ b/dev/digital/Firmware_TEST/src/FIRMWARE.cpp
@@ -216,7 +216,7 @@ void CV::setVoltage(uint8_t cvIndex, Key k)
 {
     if(cvIndex >= _nCV) return;
     if(isNotKey(k)) setVoltage(cvIndex, 0);
-    setVoltage(cvIndex, _keyToVoltage[_getKeyToVoltageIndex(k)]);
+    else setVoltage(cvIndex, _keyToVoltage[_getKeyToVoltageIndex(k)]);
 }
 
 void CV::clearAll()
diff --git a/dev/digital/Firmware_TEST/src/main.cpp b/dev/digital/Firmware_TEST/src/main.cpp
index 56eeda4..5a77097 100644
--- a/dev/digital/Firmware_TEST/src/main.cpp
+++ b/dev/digital/Firmware_TEST/src/main.cpp
@@ -1,3 +1,6 @@
+/*
+*     Example Code Two
+*/
 #include "FIRMWARE_DEF.h"
 #include "FIRMWARE.h"
 
@@ -33,10 +36,20 @@ void loop()
   if(n > 0)
   {
     Serial.printf("\n\rCurrent queue length: %i", n);
+    if(n == 1) 
+    {
+      cv.setVoltage(0, keyboard.getQueue(0));
+      cv.setVoltage(1, NOT_A_KEY);
+    }
+    else if(n >= 2) 
+    {
+      cv.setVoltage(0, keyboard.getQueue(0));
+      cv.setVoltage(1, keyboard.getQueue(1));
+    }
+
     for(int i = 0; (i < N_CV_GATES) && (i < n); i++)
     {
       Key k = keyboard.getQueue(i);
-      cv.setVoltage(i, k);
       if(isNotKey(k)) Serial.printf("\n\rQueue position %i: NOT A KEY", i);
       else Serial.printf("\n\rQueue position %i: R%iC%i", i, k.row, k.col);
     }
diff --git a/dev/digital/Firmware_TEST/src/main.cpp.1 b/dev/digital/Firmware_TEST/src/main.cpp.1
new file mode 100644
index 0000000..bf02675
--- /dev/null
+++ b/dev/digital/Firmware_TEST/src/main.cpp.1
@@ -0,0 +1,50 @@
+/*
+*     Example Code One 
+*/
+#include "FIRMWARE_DEF.h"
+#include "FIRMWARE.h"
+
+static byte pins_keyboard_row[N_KEYBOARD_ROW] = {PIN_K_R0, PIN_K_R1, PIN_K_R2, PIN_K_R3};
+static byte pins_keyboard_col[N_KEYBOARD_COL] = {PIN_K_C0, PIN_K_C1, PIN_K_C2};
+
+Keyboard keyboard(N_KEYBOARD_ROW, N_KEYBOARD_COL, pins_keyboard_row, pins_keyboard_col);
+
+Adafruit_MCP4728 MCP4728;
+MCP4728_channel_t cvMap[N_CV_GATES] = {MCP4728_CHANNEL_A, MCP4728_CHANNEL_B};
+uint16_t keyToVoltage[N_KEYBOARD_ROW*N_KEYBOARD_COL] = {
+    1*83, 5*83, 9*83,
+    2*83, 6*83, 10*83,
+    3*83, 7*83, 11*83,
+    4*83, 8*83, 12*83
+};
+
+CV cv(&MCP4728, &Wire, N_CV_GATES, cvMap, keyToVoltage, N_KEYBOARD_ROW, N_KEYBOARD_COL);
+
+void setup()
+{
+  Serial.begin(BAUDRATE);
+  keyboard.begin();
+  cv.begin(PIN_SDA, PIN_SCL);
+}
+
+void loop() 
+{
+  keyboard.update();
+
+  int n = keyboard.getQueueLength();
+
+  if(n > 0)
+  {
+    Serial.printf("\n\rCurrent queue length: %i", n);
+    for(int i = 0; (i < N_CV_GATES) && (i < n); i++)
+    {
+      Key k = keyboard.getQueue(i);
+      cv.setVoltage(i, k);
+      if(isNotKey(k)) Serial.printf("\n\rQueue position %i: NOT A KEY", i);
+      else Serial.printf("\n\rQueue position %i: R%iC%i", i, k.row, k.col);
+    }
+  }
+  else cv.clearAll();
+
+  delay(50);
+}
\ No newline at end of file