//tabella delle freuenze e delle note
unsigned int pitch[] = {
    0, 33,35,37,39,41,44,46,49,52,55,58,
    62,65,69,73,78,82,87,93,98,104,110,117,
    123,131,139,147,156,165,175,185,196,208,220,233,
    247,262,277,294,311,330,349,370,392,415,440,466,
    494,523,554,587,622,659,698,740,784,831,880,932,
    988,1047,1109,1175,1245,1319,1397,1480,1568,1661,1760,1865,
    1976,2093,2217,2349,2489,2637,2794,2960,3136,3322,3520,3729};
int f=440;
int prec=f;
int k;

void setup() {
  pinMode(8, OUTPUT);

}

void loop() {
  k=map(analogRead(A0),0,1023,0,83);
  f=pitch[k];
  if (f!= prec) {
    tone(8,f);
    prec=f;
  }
}