Cant get VU meter and sin generator to work together.

hi, i'm trying combine sin wave generator , vu meter. problem wave crested distorted.

code: [select]


void loop() {
  long sumofsquares = 0;
 
  (int i=0; i<numberofsamples; i++) { //take many readings , average them
   sample = analogread(1);             //take reading
    signal1 = (sample - middlevalue);      //work out offset center
    signal2 = signal1 * signal1;                     //square make values positive
   sumofsquares += signal2;               //add total
  }
  averagereading = sumofsquares/numberofsamples;     //calculate running average
  runningaverage=(((averagedover-1)*runningaverage)+averagereading)/averagedover;

/* if (runningaverage>threshold){         //is average more threshold ?
    digitalwrite(ledpin, high);          //if turn on led
  }else{
    digitalwrite(ledpin, low);           //if isn't turn led off
  } */
  serial.println(runningaverage);        //print value can check it
  //delay (10);
 
  if (runningaverage > 0)
  {
    digitalwrite(led[1], high);   
  }
  else { digitalwrite(led[1], low);}
 

even when disconnect led's , electret microphone i'm having problem. there wrong code itself. appreciated.

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