Editor freezes while playing audio loop.

Hi there. Recenty my unity editor started crashing. It freezes kompletely and I need to use the task manager to terminate it. It happens during testing my scene at random points and more frequent when I quit testing. I dug up the log in AppData\Local\Unity\Editor but nothing related to the crash appears there.

The problem occured first after I added background audio loops and never appeared when the corresponding gameobject was deactivated (so far). The audio loops are in the it format and the preview shows: 32bit, 48000Hz, stereo, unlimited, 167,7 kb (it). The script which manages the audio clips works as intended (see below).

I have no idea what causes those crashes. Any help is appreciated.

BackgroundMusic.js :

 var clips : AudioClip[];
 private var _audio : AudioSource;
 
 function Start () {
     _audio = GetComponent(AudioSource);
     if(clips.Length == 0) Debug.Log("No AudioClip assigned!");
     _audio.loop = true;
     PickRandom();
     _audio.Play();
 }
 
 function Update () {
     if(Input.GetKeyDown(KeyCode.M)){
         _audio.mute = !_audio.mute;
     }
     if(Input.GetKeyDown(KeyCode.N)){
         PickNext();
     }
 }
 
 function PickRandom() : void {
     var rand : int = Random.Range(0, clips.length);
     _audio.clip = clips[rand];
     Debug.Log("currently playing " + _audio.clip.name);
     _audio.Play();
 }
 function GetIndex() : int {
     for(var j : int = 0; j < clips.length ; j++){
         if(_audio.clip.name == clips[j].name){
             return j + 1 ;
         }
     }
     Debug.Log("BackgroundMusic: GetIndex() failed. return 0");
     return 0;
 }
 function PickNext() : void {
     var index = GetIndex();
     if(index == clips.Length) index = 0;
     _audio.clip = clips[index];
     Debug.Log("currently playing " + _audio.clip.name);
     _audio.Play();
 }
 
 @script RequireComponent(AudioSource)