Line Renderer Music Visualizer Not Working

OK This is probably something simple that I am missing but I am just not seeing please help if you can. My audio clip plays fine when activated but my line renderer audio visualizer only seems to work if I assign a sound clip directly to the audio source, it seems to be ignoring my audio clips in my array??? Please help :) Here is my entire script. I shave also attached a screen capture to also help with understanding :)

 using UnityEngine;
 using System.Collections;
 
 public class VBtestAudioVisualizer : MonoBehaviour
 {
     //Audio Clip Selections
     public AudioClip VoiceClip01;
     public AudioClip VoiceClip02;
     public AudioClip VoiceClip03;
     public AudioClip VoiceClip04;
 
 
     //An AudioSource object so the music can be played
     public AudioSource aSource;
     //A float array that stores the audio samples
     public float[] samples = new float[64];
     //A renderer that will draw a line at the screen
     public LineRenderer lRenderer;
     //A reference to the cube prefab
     public GameObject cube;
     //The transform attached to this game object
     public Transform goTransform;
     //The position of the current cube. Will also be the position of each point of the line.
     private Vector3 cubePos;
     //An array that stores the Transforms of all instantiated cubes
     private Transform[] cubesTransform;
     //The velocity that the cubes will drop
     private Vector3 gravity = new Vector3(0.0f,5.0f,0.0f);
     
     void Start()
     {
         //The line should have the same number of points as the number of samples
         lRenderer.SetVertexCount(samples.Length);
         //The cubesTransform array should be initialized with the same length as the samples array
         cubesTransform = new Transform[samples.Length];
         //Center the audio visualization line at the X axis, according to the samples array length
         goTransform.position = new Vector3(-samples.Length/2,goTransform.position.y,goTransform.position.z);
         
         //Create a temporary GameObject, that will serve as a reference to the most recent cloned cube
         GameObject tempCube;
         
         //For each sample
         for(int i=0; i<samples.Length-1;i++)
         {
             //Instantiate a cube placing it at the right side of the previous one
             tempCube = (GameObject) Instantiate(cube, new Vector3(goTransform.position.x + i, goTransform.position.y, goTransform.position.z),Quaternion.identity);
             //Get the recently instantiated cube Transform component
             cubesTransform[i] = tempCube.GetComponent<Transform>();
             //Make the cube a child of this game object
             cubesTransform[i].parent = goTransform;
         }
     }
     
     void Update () 
     {
         //Obtain the samples from the frequency bands of the attached AudioSource
         aSource.GetSpectrumData(this.samples,0,FFTWindow.BlackmanHarris);
         
         // For each sample
         for(int i=0; i<samples.Length-1;i++)
         {
             cubePos.Set(cubesTransform[i].position.x, Mathf.Clamp(samples[i]*(i*i),0,50), cubesTransform[i].position.z);
             
             //If the new cubePos.y is greater than the current cube position
             if(cubePos.y >= cubesTransform[i].position.y)
             {
                 //Set the cube to the new Y position
                 cubesTransform[i].position = cubePos;
             }
             else
             {
                 //The spectrum line is below the cube, make it fall
                 //                cubesTransform[i].position -= gravity;
                 cubesTransform[i].position = cubePos;
             }
             
             /*Set the position of each vertex of the line based on the cube position.
              * Since this method only takes absolute World space positions, it has 
              * been subtracted by the current game object position.*/
             lRenderer.SetPosition(i, cubePos - goTransform.position);
         }
         
     }
 
 
     
     //Audio Play Buttons
     public void  GoVoiceClip01(){
         audio.PlayOneShot(VoiceClip01);
     }
 }