#include "pitches.h"

#define SPEAKER_PIN 8
#define NUM_BUTTONS 8

const uint8_t buttonPins[NUM_BUTTONS] = { 12, 11, 10, 9, 7, 6, 5, 4 };
const uint8_t ledPins[NUM_BUTTONS] = { A0, A1, A2, A3, A4, A5, 3, 2 };
const int buttonTones[] = {
  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
  NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5
};
const int numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

void setup() {
  for (uint8_t i = 0; i < NUM_BUTTONS; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP); // Set each button pin as input with pull-up
    pinMode(ledPins[i], OUTPUT); // Set each LED pin as output
    digitalWrite(ledPins[i], LOW); // Turn off LEDs initially
  }
  pinMode(SPEAKER_PIN, OUTPUT); // Set speaker pin as output
}

void loop() {
  int pitch = 0;
  for (int i = 0; i < NUM_BUTTONS; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      pitch = buttonTones[i]; // Set pitch according to the pressed button
      digitalWrite(ledPins[i], HIGH); // Turn on the corresponding LED
    } else {
      digitalWrite(ledPins[i], LOW); // Turn off the LED if button is not pressed
    }
  }
  if (pitch) {
    tone(SPEAKER_PIN, pitch); // Play tone if pitch is set
  } else {
    noTone(SPEAKER_PIN); // Stop tone if no button is pressed
  }
}