How to check which audio is playing from Array

 /**
  * None of this is tested, if you have 
  * issues, please work them out yourself.
  * Learn from experience!
 **/
 // Written in C#
 using System;
 using UnityEngine;
 using System.Collections;
 
 public class RandomAudio : MonoBehavior
 {
     // Store a local copy of an empty AudioClip array
     // Define your clips in your editor
     // If no items display in your editor, remove the 0
     public AudioClip[] audioFiles = new AudioClip[0];
     
     // Store a local int of your audio clip ID
     private int audioID = 0;
     
     // Store a local int of your audio clip array length
     private int audioLength = 0;
     
     // When the application starts...
     public void Start()
     {
         // Get array length, and store it
         this.audioLength = this.audioFiles.Length - 1;
         
         // If no audio,
         if(this.audioLength < 1) {
             // Failed, exit
             Application.Quit();
         }
     }
     
     public void Update()
     {
         // If the audio is not playing,
         // Side Note: this might not be perfect syntax
         if(!gameObject.audio.isPlaying) {
             // Change your audioID
             this.changeAudio();
         }
     }
     
     private void changeAudio()
     {
         // Create a random instance, may need to be = new System.Random(); 
         Random randomNumberGenerator = new Random();
         
         // Set the audioID
         this.audioID = randomNumberGenerator(0, this.audioLength);
         
         // Set the gameObject to use the new audio clip
         gameObject.audio.audioClip = audioFiles[this.audioID];
         
         // Play the audio clip
         gameObject.audio.play();
     }
 }