MSGEQ7 Simple Spectrum Analyzer

#define msg7RESET 11
#define msg7Strobe 12
#define msg7DCout 0
const int LEDpins[7] = {3,5,5,6,9,9,10};    // there are 5 LEDs and 7 freq bands.  So, repeat LEDs

#define pushButton 2

void setup() {
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  for (int x=0; x<7; x++) {
      pinMode(LEDpins[x], OUTPUT);
  }
  pinMode(msg7RESET, OUTPUT);
  pinMode(msg7Strobe, OUTPUT);

  pinMode(pushButton, INPUT);       // never actually used in this example.
  digitalWrite(pushButton, HIGH);  // Enable internal pull-up
}

void loop() {
    digitalWrite(msg7RESET, HIGH);          // reset the MSGEQ7's counter
    delay(5);
    digitalWrite(msg7RESET, LOW);

    for (int x = 0; x < 7; x++){
        digitalWrite(msg7Strobe, LOW);      // output each DC value for each freq band
        delayMicroseconds(35); // to allow the output to settle
        int spectrumRead = analogRead(msg7DCout);

        int PWMvalue = map(spectrumRead, 0, 1024, 0, 255);  // scale analogRead's value to Write's 255 max
        if (PWMvalue < 50)
            PWMvalue = PWMvalue / 2;        // bit of a noise filter, so the LEDs turn off at low levels

        analogWrite(LEDpins[x], PWMvalue);
        digitalWrite(msg7Strobe, HIGH);
    }
}