Enemy death sound is buzzing

I want to add a death sound when enemy dies. But the audio is buzzing. Couldnt figure it out. Any idea?

 #pragma strict
 
 var DeathSound : AudioClip;
 
 function Update () {

   Death = maxHealth <= 0;
 
     if(Death)
     {
         
         anim.SetBool("Death",true);
         GetComponent.<AudioSource>().PlayOneShot(DeathSound);
         EnemyManagerRandom.DeadCount +=1;
         Destroy(gameObject);
     }
     else
     {
         anim.SetBool("Death",false);
     }
  }