render audio sample texture

using System.Diagnostics;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using Unity.Collections;
using Unity.Jobs;
using Unity.Mathematics;
using UnityEngine;
using Debug = UnityEngine.Debug;

public class micRecorder : MonoBehaviour
{
    private AudioClip clip;
    private AudioSource audio;

    private Texture2D t2d;
    // Start is called before the first frame update

    private NativeArray<Color> colors;
    private NativeArray<float> samples;

    void Start()
    {
        audio = GetComponent<AudioSource>();

        foreach (var device in Microphone.devices) { Debug.Log("Name: " + device); }

        audio.clip = Microphone.Start("Microphone (3- Logitech G933 Gaming Headset)", true, 1, 9600);
        clip = audio.clip;
        audio.loop = true;


        Stopwatch sw = new Stopwatch();

        sw.Start();

        while (!(Microphone.GetPosition("Microphone (3- Logitech G933 Gaming Headset)") > 0)) {}

        sw.Stop();

        print(sw.ElapsedMilliseconds);

        audio.Play();

        t2d = new Texture2D(512, 256, TextureFormat.RGBAFloat, false);

        GetComponent<MeshRenderer>().material.SetTexture("_MainTex", t2d);

        colors = new NativeArray<Color>(512 * 256, Allocator.Persistent);
        samples = new NativeArray<float>(9600, Allocator.Persistent);
    }

    private void OnDisable()
    {
        colors.Dispose();
        samples.Dispose();
    }

    // Update is called once per frame

    float[] sampleBuffer = new float[9600];

    private int lastCount = 0;

    void FixedUpdate()
    {


        var ds = audio.timeSamples - lastCount;

        audio.clip.GetData(sampleBuffer, 0);

        samples.CopyFrom(sampleBuffer);

        var fillJob = new FillTextureJob {colors = colors, sampleData = samples};

        fillJob.Schedule().Complete();

        t2d.SetPixels(colors.ToArray());
        t2d.Apply();

    }
}

struct FillTextureJob : IJob
{
    public NativeArray<Color> colors;

    [ReadOnly] public NativeArray<float> sampleData;

    public void Execute()
    {
        int samplestep = 9600 / 512;

        for (int x = 0; x < 512; x++)
        {
            int value = (int) (sampleData[x*samplestep] * 128) + 128;

            for (int y = 0; y < 256; y++)
            {
                colors[x + y * 512] = value == y ? Color.white : Color.black;
            }

        }
    }
}