#define  Do  261
#define  Re  293
#define  Mi  329
#define  Fa  349
#define  Sol  391
#define  La  440
#define  Si  493
#define  Do2  523

void setup() {
  pinMode(2, OUTPUT);
  pinMode(6, INPUT);
  pinMode(7, INPUT);
  pinMode(8, INPUT);
  pinMode(9, INPUT);
  pinMode(10, INPUT);
  pinMode(11, INPUT);
  pinMode(12, INPUT);
  pinMode(13, INPUT);
}

void loop() {

  if (digitalRead(13)==HIGH){
    tone(2,Do,100);  
  }
  if (digitalRead(12)==HIGH){
    tone(2,Re,100);    
  }
  if (digitalRead(11)==HIGH){
    tone(2,Mi,100);    
  }
  if (digitalRead(10)==HIGH){
    tone(2,Fa,100);    
  }
  if (digitalRead(9)==HIGH){
    tone(2,Sol,100);    
  }
  if (digitalRead(8)==HIGH){
    tone(2,La,100);    
  }
  if (digitalRead(7)==HIGH){
    tone(2,Si,100);    
  }
  if (digitalRead(6)==HIGH){
    tone(2,Do2,100);    
  }  
delay(100);
noTone(2);
}