How to get my touch controllers to vibrate?

After looking around and try to understand what i was reading I finaly got it to work and wrote a simple demo to see if I understod it correctly. Here it is.

 using UnityEngine;
 
 public class TeleportScript : MonoBehaviour {
 
     //Audio input used for vibrate left controller
     public AudioClip AC;
 
     // used to make a saw wave 
     private int wave = 0;
             
     // Update is called once per frame
     void Update () {
 
         //checks if any button is pressed on the touch controllers
         OVRInput.Update();
 
         //Left hand controller index button
         if(OVRInput.Get(OVRInput.Axis1D.PrimaryIndexTrigger,OVRInput.Controller.Touch) > 0f) {
             //outputs vibration to left controller
             OVRHaptics.Channels[0].Preempt(new OVRHapticsClip(AC));
         }
 
         //Right hand controller index button
         if (OVRInput.Get(OVRInput.Axis1D.SecondaryIndexTrigger, OVRInput.Controller.Touch) > 0f) {
             
             //the value determens the power of the vibration
             //scale from 0 to 255 
             byte[] noize = { 255 };
             // tho 40 was about when I coulde start feel it
             //byte[] noize = { 40};
 
             //outputs vibration to left controller
             OVRHaptics.Channels[1].Preempt(new OVRHapticsClip(noize, 1));
         }
 
         //right hand trigger button
         if (OVRInput.Get(OVRInput.Axis1D.SecondaryHandTrigger, OVRInput.Controller.Touch) > 0f) {
             //make a saw wave 
             wave++;
 
             if (wave >= 255) {
                 wave = 0;
             }
 
             byte[] noize = { (byte)wave };
 
             //outputs vibration to left controller
             OVRHaptics.Channels[1].Preempt(new OVRHapticsClip(noize, 1));
         }
 
         //this updates the controlls
         OVRHaptics.Process();
     }
 }

On the left controler I used a audiofile wich was a 30 sec long sin wave and the controller woulde vibrate untill the hole clip has been played tru.