 
  void setup() {          
    // setup internal pullups on "piano keys" (pins D2 through D6)
+   pinMode(D3, INPUT);
+   pinMode(D4, INPUT);
+   pinMode(D5, INPUT);
    pinMode(D6, INPUT);
    pinMode(D7, INPUT);
    pinMode(D8, INPUT);

 int tonepin = 13;  // PWM0 output = 9, PWM1 output = 10

 // these are the "piano keys" - they are just input pins
 #define D6 6
 #define D7 7
 #define D8 8

   pinMode(D10, INPUT);
   pinMode(D11, INPUT);
   
   digitalWrite(D3, HIGH);
   digitalWrite(D4, HIGH);
   digitalWrite(D5, HIGH);
   digitalWrite(D6, HIGH);
   digitalWrite(D7, HIGH);
   digitalWrite(D8, HIGH);
