int spectrumStrobe = 4; // Strobe Pin
int spectrumReset  = 5; // Reset Pin
int spectrumL[7];       // Arrays for band values
int spectrumR[7];
int eqBand;             // Band counter
char dataL[50];         // Arrays for data output
char dataR[50];

void setup() {
  Serial.begin(115200);
  pinMode(spectrumReset,       OUTPUT); // reset
  pinMode(spectrumStrobe,      OUTPUT); // strobe
  // This is following page 4 in the datasheet
  digitalWrite(spectrumReset,  HIGH);   // Set reset high
  digitalWrite(spectrumStrobe, HIGH);   // Toggle the strobe pin
  delayMicroseconds(18);
  digitalWrite(spectrumStrobe, LOW);
  delayMicroseconds(18);
  digitalWrite(spectrumReset,  LOW);    // Set reset low
  digitalWrite(spectrumStrobe, HIGH);   // Toggle strobe high again
  delayMicroseconds(18);
}

void readMSGEQ7()
// Function to read 7 band equalizers
{
  for(eqBand = 0; eqBand < 7; eqBand++)
  {
    digitalWrite(spectrumStrobe, LOW);  // Set strobe low to begin reading
    delayMicroseconds(36);              // Wait for the output to settle 
    spectrumL[eqBand] = analogRead(0);  // store left bands
    spectrumR[eqBand] = analogRead(1);  // store right bands
    digitalWrite(spectrumStrobe, HIGH); // Set strobe high to bump to next band
  }
}

void loop()
{
  readMSGEQ7();
  // display values of left & right channel bands on serial monitor
  sprintf(dataL,  "left: %3d - %3d - %3d - %3d - %3d - %3d - %3d", spectrumL[0], spectrumL[1], spectrumL[2], spectrumL[3], spectrumL[4], spectrumL[5], spectrumL[6]);
  // Display right channel in reverse, so the data output has low frequencies on the outside with high frequencies on the inside
  sprintf(dataR, "%3d - %3d - %3d - %3d - %3d - %3d - %3d: right", spectrumR[6], spectrumR[5], spectrumR[4], spectrumR[3], spectrumR[2], spectrumR[1], spectrumR[0]);

  Serial.print(dataL);
  Serial.print(" | ");
  Serial.print(dataR);
  Serial.println();
}