Simple audio visualizer script to be used with VRChat Udon and UdonSharp.

SimpleUdonAudVis.cs

// Audio Visualize script: 
// -Assign a prefab asset to the prefab01 field in the Inspector.
// -Set YScale value in Inspector.
// -Assign a audio source to the audSource field in the Inspector.

using UdonSharp;
using UnityEngine;
using VRC.SDKBase;
using VRC.Udon;

public class AudVisUScript01 : UdonSharpBehaviour
{
    public GameObject prefab01;
    Transform[] transArr01;
    public float YScale;
    public AudioSource audSource;

    void Start()
    {
        transArr01 = new Transform[64];
        for(int i = 0; i < transArr01.Length; i++)
        {
            GameObject go = VRCInstantiate(prefab01);
            transArr01[i] = go.transform;
            transArr01[i].parent = transform;
        }
    }

    void Update()
    {
        float[] spectrumData = new float[transArr01.Length];
        audSource.GetSpectrumData(spectrumData, 0, FFTWindow.Triangle);

        for(int i = 0; i < spectrumData.Length; i++)
        {
            transArr01[i].localPosition = new Vector3(i,transform.position.x, transform.position.z);
            transArr01[i].localScale = new Vector3(1,spectrumData[i]*YScale,1);
        }
    }
}