Simple audio visualizer for Unity

AudioVisualizer.cs

using System.Linq;
using UnityEngine;

[RequireComponent(typeof(AudioSource))]
public class AudioVisualizer : MonoBehaviour
{
    [SerializeField] private float barWidth = 0.1f;
    [SerializeField] private float updateDelay = 0.04f;
    [SerializeField] private Color[] barColors;
    [SerializeField] private float barMultiplier = 2f;

    private float[] spectrumData = new float[64];
    private float[] spectrumGrouped = new float[5];
    private float updateTime = 0f;

    void Update()
    {
        // Wait for next update time
        if (updateTime > Time.time)
            return;

        // Get spectrum data
        AudioListener.GetSpectrumData(spectrumData, 0, FFTWindow.BlackmanHarris);

        // Set next update time
        updateTime = Time.time + updateDelay;
    }

    private void OnDrawGizmos()
    {
        // Group the bars so we only have 5 bars
        // You can play around with these to your liking
        spectrumGrouped[0] = spectrumData[0..1].Sum();
        spectrumGrouped[1] = spectrumData[2..5].Sum();
        spectrumGrouped[2] = spectrumData[6..13].Sum();
        spectrumGrouped[3] = spectrumData[14..30].Sum();
        spectrumGrouped[4] = spectrumData[31..63].Sum();

        // Draw a gizmo for each bar
        for (int i = 0; i < spectrumGrouped.Length; i++)
        {
            // Calculate and clamp bar height
            var barHeight = Mathf.Clamp(spectrumGrouped[i] * barMultiplier, 0.001f, 1f);

            // Set bar color
            Gizmos.color = barColors[i];

            // Draw bar
            Gizmos.DrawCube(
                new Vector3(i * barWidth, barHeight / 2f, 0f), // Center
                new Vector3(barWidth, barHeight, barWidth)); // Size
        }
    }
}