#include <Tone.h>
#define ERROR_WINDOW 50

int notes[] = { NOTE_A3,
                NOTE_B3,
                NOTE_C4,
                NOTE_D4,
                NOTE_E4,
                NOTE_F4,
                NOTE_G4,
                NOTE_A4,
                NOTE_B4,
                NOTE_C5};

// You can declare the tones as an array
Tone Sounds[2];

void setup(void){
  Serial.begin(9600);
  Sounds[0].begin(9);
  Sounds[1].begin(10);
}

void loop(void){
  char c;
int val=analogRead(A0);
int val2=analogRead(A1);
Serial.print("val1=");
Serial.println(val);
delay(100);
if(val<50){
   Sounds[0].play(notes[8]);
 }else if(val<65){
   Sounds[0].play(notes[7]);
}else if(val<75){
   Sounds[0].play(notes[6]);
}else if(val<90){
   Sounds[0].play(notes[5]);
}else if(val<150){
   Sounds[0].play(notes[4]);
}else if( val<200){
   Sounds[0].play(notes[3]);
}else if( val<250){
   Sounds[0].play(notes[2]);
}else if( val<300){
   Sounds[0].play(notes[1]);
}else {
  Sounds[0].stop();
 
}


if(val2<50){
   Sounds[1].play(notes[0]);
 }else if(val2<75){  
   Sounds[1].play(notes[1]);
}else if(val2<100){
   Sounds[1].play(notes[2]);
}else if(val2<150){
   Sounds[1].play(notes[3]);
}else if(val2<200){
   Sounds[1].play(notes[4]);
}else if( val2<250){
   Sounds[1].play(notes[5]);
}else if( val2<300){
   Sounds[1].play(notes[6]);
}else if( val2<400){
   Sounds[1].play(notes[7]);
}else {
  Sounds[1].stop();
}
}