diff --git a/noteblock.ino b/noteblock.ino
index f2197c614574e9e4478fb5da13707703ac495561..b5668b69dff9ff2634168aa0065e452c995ba26a 100644
--- a/noteblock.ino
+++ b/noteblock.ino
@@ -17,23 +17,25 @@
 #define VALVE_3 7 // PE6 // 4mm
 #define VALVE_4 8 // PB4 // 4mm
 #define VALVE_5 9 // PB5 // 4mm
+#define VALVE_6 3 // PD0 // 4mm
+#define VALVE_7 2 // PD1 // 4mm
 
-#define NUM_VALVES 6
+#define NUM_VALVES 8
 
 // array of currently active notes, index 0 is the oldest one
-static int16_t notes[NUM_VALVES] = {-1, -1, -1, -1, -1, -1};
+static int16_t notes[NUM_VALVES] = {-1, -1, -1, -1, -1, -1, -1, -1};
 
 // array of the length of the tone period required to create the tone
-static uint16_t periods[NUM_VALVES] = {0, 0, 0, 0, 0, 0};
+static uint16_t periods[NUM_VALVES] = {0, 0, 0, 0, 0, 0, 0, 0};
 
 // array of the current state of the valve pins (for tone periods)
-static uint8_t states[NUM_VALVES] = {0, 0, 0, 0, 0, 0};
+static uint8_t states[NUM_VALVES] = {0, 0, 0, 0, 0, 0, 0, 0};
 
 // array for the period timer helpers
-static uint64_t lastNoteMicros[NUM_VALVES] = {0, 0, 0, 0, 0, 0};
+static uint64_t lastNoteMicros[NUM_VALVES] = {0, 0, 0, 0, 0, 0, 0, 0};
 
 // array of the valve pin numbers
-static const uint8_t valves[NUM_VALVES] = {VALVE_0, VALVE_1, VALVE_2, VALVE_3, VALVE_4, VALVE_5};
+static const uint8_t valves[NUM_VALVES] = {VALVE_0, VALVE_1, VALVE_2, VALVE_3, VALVE_4, VALVE_5, VALVE_6, VALVE_7};
 
 static float noteToMidi[128];
 
@@ -895,24 +897,30 @@ void loop() {
       //digitalWrite(valves[i], states[i]);
 
       switch (i) {
-        case 0: // PD4
+        case 0: // PD4 // 6mm
         PORTD ^= B00010000;
         break;
-        case 1: // PC6
+        case 1: // PC6 // 6mm
         PORTC ^= B01000000;
         break;
-        case 2: // PD7
+        case 2: // PD7 // 6mm
         PORTD ^= B10000000;
         break;
-        case 3: // PE6
+        case 3: // PE6 // 4mm
         PORTE ^= B01000000;
         break;
-        case 4: // PB4
+        case 4: // PB4 // 4mm
         PORTB ^= B00010000;
         break;
-        case 5: // PB5
+        case 5: // PB5 // 4mm
         PORTB ^= B00100000;
         break;
+        case 6: // PD0 // 4mm
+        PORTD ^= B00000001;
+        break;
+        case 7: // PD1 // 4mm
+        PORTD ^= B00000010;
+        break;
       }
     } else if (notes[i] == -1) { // be sure to end notes that should be ended
       digitalWrite(valves[i], LOW);