#include <CapacitiveSensor.h>
const int sendPin = 9;
int sensorPins[] = {2, 3, 4, 5, 6, 7, 15, 14, 16, A0, A2};
CapacitiveSensor sensors [12] = { // lbr does not offer 0 arg constructor
  CapacitiveSensor (sendPin, sensorPins[0]),
  CapacitiveSensor (sendPin, sensorPins[1]),
  CapacitiveSensor (sendPin, sensorPins[2]),
  CapacitiveSensor (sendPin, sensorPins[3]),
  CapacitiveSensor (sendPin, sensorPins[4]),
  CapacitiveSensor (sendPin, sensorPins[5]),
  CapacitiveSensor (sendPin, sensorPins[6]),
  CapacitiveSensor (sendPin, sensorPins[7]),
  CapacitiveSensor (sendPin, sensorPins[8]),
  CapacitiveSensor (sendPin, sensorPins[9]),
  CapacitiveSensor (sendPin, sensorPins[10]),
  CapacitiveSensor (sendPin, sensorPins[11])
};

unsigned int toneFrequencies[] = {262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523};

const int led = 7;
const int speaker = A3;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
}

void loop() {
  for (int i = 0; i < sizeof(sensorPins) / sizeof (sensorPins[0]); i++) {

    int val = sensors[i].capacitiveSensor(30);
    Serial.println(val);
    delay(1);
    if (val >= 10000) {
      digitalWrite(led, HIGH);
      tone (speaker, toneFrequencies[i]);
      delayMicroseconds(100);
    }

    else if (val < 10000) {
      digitalWrite(led, LOW);
      noTone(speaker);
    }

  }
}