#include "pitches.h";
byte oktava;
byte piezo = 12;

byte klavesy[12] = {6,7,5,8,4,3,9,2,10,1,11,0};  //piny jednotlivych tlacitek zleva doprava
//tony v jednotlivych oktavach
int oktavy[4][12] = 
{{NOTE_C3, NOTE_CS3, NOTE_D3, NOTE_DS3, NOTE_E3, NOTE_F3,
  NOTE_FS3, NOTE_G3, NOTE_GS3, NOTE_A3, NOTE_AS3, NOTE_B3},
{NOTE_C4, NOTE_CS4, NOTE_D4, NOTE_DS4, NOTE_E4, NOTE_F4, 
 NOTE_FS4, NOTE_G4, NOTE_GS4, NOTE_A4, NOTE_AS4, NOTE_B4},
{NOTE_C5, NOTE_CS5, NOTE_D5, NOTE_DS5, NOTE_E5, NOTE_F5, 
 NOTE_FS5, NOTE_G5, NOTE_GS5, NOTE_A5, NOTE_AS5, NOTE_B5},
{NOTE_C6, NOTE_CS6, NOTE_D6, NOTE_DS6, NOTE_E6, NOTE_F6, 
 NOTE_FS6, NOTE_G6, NOTE_GS6, NOTE_A6, NOTE_AS6, NOTE_B6}};

void setup() {
	tone(piezo, 440, 500);
}

void loop() {
	oktava = map(analogRead(A0),0,1023,0,3);
	for(int i = 0; i < 12; i++){
		if(digitalRead(klavesy[i]) == HIGH){
			tone(piezo, oktavy[oktava][i], 100);
		}   
	}
}