#define bdo 2
#define bre 3
#define bmi 4
#define bfa 5
#define bsol 6
#define bla 7
#define bsi 8
#define buz 10

void setup(){

  pinMode(bdo, INPUT);
  pinMode(bre, INPUT);
  pinMode(bmi, INPUT);
  pinMode(bfa, INPUT);
  pinMode(bsol, INPUT);
  pinMode(bla, INPUT);
  pinMode(bsi, INPUT);
  pinMode(buz, OUTPUT);

  digitalWrite(bdo, HIGH);
  digitalWrite(bre, HIGH);
  digitalWrite(bmi, HIGH);
  digitalWrite(bfa, HIGH);
  digitalWrite(bsol, HIGH);
  digitalWrite(bla, HIGH);
  digitalWrite(bsi, HIGH);

}

  void loop(){
  if(digitalRead(bdo)==LOW){
      tone(buz,264);//DO
  }
  else if(digitalRead(bre)==LOW){
    tone(buz,297);//RE
  }
  else if(digitalRead(bmi)==LOW){
    tone(buz,330);//MI
  }
  else if(digitalRead(bfa)==LOW){
    tone(buz,352);//FA
  }
  else if(digitalRead(bsol)==LOW){
    tone(buz,396);//SOL
  }
  else if(digitalRead(bla)==LOW){
    tone(buz,440);//LA
  }
  else if(digitalRead(bsi)==LOW){
    tone(buz,495);//SI
  }
  else{
    noTone(10);
  }
  }