Fase média, Arduino

#define pinBuzzer 8

int freqMax = 0;


void setup () {
  Serial.begin(9600);
  pinMode(pinBuzzer, OUTPUT);



}

void loop () {
   /*for (int freq = 0; freq < 20000; freq+=50) {
      //tone(pinBuzz, freq);
      noTone(pinBuzz);
   }*/
   freqMax = random(0, 4000);
   Serial.print("A frequencia maxima: ");
   Serial.println(freqMax);
   short freqDiv = freqMax/4;
   Serial.print("A frequencia divida por 4: ");
   Serial.println(freqDiv);
   for (int freqInicial = 0; freqInicial < freqMax; freqInicial+=(freqMax/4)) {
      //tone(pinBuzzer, freqInicial);
   }
   delay(1000);
}