#include <Keypad.h>
#define TONE_USE_INT
#define TONE_PITCH 440
#include <TonePitch.h>


const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {

}

void loop() {
  char key = keypad.getKey();  
    if(key == '1') {
      tone(12,NOTE_C4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '2') {
       tone(12,NOTE_D4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '3') {
       tone(12,NOTE_E4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '4') {
       tone(12,NOTE_F4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '5') {
       tone(12,NOTE_G4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '6') {
       tone(12,NOTE_A4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '7') {
       tone(12,NOTE_B4,1000);
      delay(100);
      noTone(12);
    }
    if(key == '8') {
       tone(12,NOTE_C5,1000);
      delay(100);
      noTone(12);
    }
    if(key == '9') {
       tone(12,NOTE_D5,1000);
      delay(100);
      noTone(12);
    }
    if(key == '0') {
       tone(12,NOTE_E5,1000);
      delay(100);
      noTone(12);
    }
    if(key == '*') {
       tone(12,NOTE_F5,1000);
      delay(100);
      noTone(12);
    }
    if(key == '#') {
       tone(12,NOTE_G5,1000);
      delay(100);
      noTone(12);
    }
     if(key == 'A') {
       tone(12,NOTE_A5,1000);
      delay(100);
      noTone(12);
    }
     if(key == 'B') {
       tone(12,NOTE_B5,1000);
      delay(100);
      noTone(12);
    }
     if(key == 'C') {
       tone(12,NOTE_C6,1000);
      delay(100);
      noTone(12);
    }
     if(key == 'D') {
       tone(12,NOTE_D6,1000);
      delay(100);
      noTone(12);
    }
}