Creating a dynamic mesh with audio = crash after 30secs ?

Hello all

I'm trying to make a mesh using audio. I have just a rectangle which size and color are set on samples and spectrum values.

When i run game mode, it "works" for 30seconds, then slow and finally, unity crash, even if i try to stop the game mode.

Maybe i have to destroy my mesh while creating another ?

I would like to instantiate this mesh, in point to make a shape with sound, is it possible in the same script or is it a bad way to do that ?

Thanks for reading

Here is the script :

 #pragma strict
 
 var numSamples : int=1024;
 
 var numSpectrum : int=1024;
 
 var widthBranche : float;
 
 var heightBranche : float;
 
 
 private var h:float;
 h *= 0.66;
 
 private var samples:float[];
 
 private var spectrums:float[];
 
 
 var tronc:GameObject;
 var brancheObject:GameObject;
 
 
 var branche:Mesh;
 var brancheMaterial:Material;
 var verticesBranche:Vector3[];
 var filterBranche:MeshFilter;
 var triangleBranche: int[];
 var normalsBranche:Vector3[];
 var uvBranche:Vector2[];
 var rendererBranche:MeshRenderer;
 
 function Start () {
 
     samples=new float[numSamples];
     spectrums=new float[numSpectrum];
     
     
     tronc=GameObject.CreatePrimitive(PrimitiveType.Sphere);
     tronc.name="tronc"; 
     
     brancheObject=new GameObject(); 
     brancheObject.name="branche"; 
     
     
     var filterBranche:MeshFilter=brancheObject.AddComponent(MeshFilter);
     branche=new Mesh();
     filterBranche.mesh=branche;
     rendererBranche=brancheObject.AddComponent(MeshRenderer);
         
     
 }
 
 
 function Update () {
 
 
     audio.GetOutputData(samples,0);
  
     audio.GetSpectrumData(spectrums,0,FFTWindow.BlackmanHarris);
     
         for (var i:int=0;i<numSamples;i++) {
 
 
         if (samples[i]>0) {
     
         if (spectrums[i]>0) {
         
         
         var couleur:Color=new Color(spectrums[i],spectrums[i],samples[i]);
         var couleur2:Color=new Color(spectrums[i]*1000,spectrums[i]*2000,samples[i]*200);
         var duration:float=1.0;    
         var lerp=Mathf.PingPong(Time.time,duration)/duration;
         
         widthBranche=spectrums[i]*1000;
         heightBranche=samples[i]*200;        
                 
         verticesBranche=new Vector3[4];
     
         verticesBranche[0] = new Vector3(0, 0, 0);
         verticesBranche[1] = new Vector3(widthBranche, 0, 0);
         verticesBranche[2] = new Vector3(0, heightBranche, 0);
         verticesBranche[3] = new Vector3(widthBranche, heightBranche, 0);
 
         branche.vertices=verticesBranche;
     
         triangleBranche=new int[6];
     
         triangleBranche[0] = 0;    
         triangleBranche[1] = 2;
         triangleBranche[2] = 1;
 
         triangleBranche[3] = 2;
         triangleBranche[4] = 3;
         triangleBranche[5] = 1;        
     
         branche.triangles=triangleBranche;
     
         normalsBranche=new Vector3[4];        
     
         normalsBranche[0] = -Vector3.forward;
         normalsBranche[1] = -Vector3.forward;
         normalsBranche[2] = -Vector3.forward;
         normalsBranche[3] = -Vector3.forward;
     
         branche.normals=normalsBranche;
     
         uvBranche=new Vector2[4];
     
         uvBranche[0] = new Vector2(0, 0);
         uvBranche[1] = new Vector2(1, 0);
         uvBranche[2] = new Vector2(0, 1);
         uvBranche[3] = new Vector2(1, 1);
 
         branche.uv = uvBranche;
     
         brancheMaterial=new Material(Shader.Find("Particles/Additive"));
         rendererBranche.material.color=Color.Lerp(couleur,couleur2,lerp);    
                                 
         
         
         
         }}else{}
     }
 }