msgeq7 Equalizer scrambled array

Hi,

I'm trying to build an arduino equalizer and is almost done but I have the following problem:

I use this code to read the values form an msgeq7 chip.:

void readaudio(){
  digitalWrite(resetPin, HIGH);
  digitalWrite(resetPin, LOW);

  avg = 0;
  soundPeak = 0;
  for (int i = 0; i < 7; i++) {
    digitalWrite(strobePin, LOW);
    delayMicroseconds(30); // to allow the output to settle
    spectrumValue[i]=analogRead(audioOutput) * sensitivity;
    if (spectrumValue[i] > soundPeak) {
      soundPeak = spectrumValue[i];
    }
    avg += spectrumValue[i];
    digitalWrite(strobePin, HIGH);
    soundValues[i] = spectrumValue[i] ;

  }

    soundAvarage = avg/7;

}

The problem is that every time I turn the system onthe frequencies are not always in the same array index, sometimes the lowest bass is on spectrumValue[5] sometimes in spectrumValue[3] and so on so i can't get it to look right.

Any toughts?

Sorry if it has been asked here, i did some searches and could not find it.

Thank you.

Luis