vu meter with arduino and hl1606 led strip

Using Arduino Audio
8

did it in software.. but now when u said it, i should try it without the offset part.
f and fn.. yaa i tried everything nothing fix now.. but it seemed to look nice with 0.99 and 1.5.

and here the code in the loop:

void loop() {
  //soundn = analogRead(A0);
  soundn = abs( analogRead(A0) - 400);

  sound = soundn;

  soundn = 0;

  //int soundn=analogRead(A0);
    
if (soundn < (sound * f))
soundn = (sound * f);
  
  if (soundn > (sound * fn))
 soundn = (sound * fn);
  
//int lvl = soundn / 28;
int lvl = map(soundn, 0, 700, 0, 38);

for (int thisLed = 0; thisLed < 38; thisLed+=1)

{ 
    if (lvl > thisLed) {
      strip.setLEDcolor(thisLed, RED);  
    }
    
    else {
            strip.setLEDcolor(thisLed,GREEN);
    }
  }
  strip.writeStrip();
}