UnityTip - Visualize an AudioFile

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
// this is a shortend example for better readability
public class UnityTip : MonoBehaviour {
    public Material emissiveMaterial; // give it a material with an emission texture
    public Color emissionColor;       // desired color

    private AudioSource _as;
    private float currentUpdateTime = 0f;
    // declared here to avoid GarbageCollection hickups
    private float clipLoudness = 0f;
    private float[] _clipSampleData;

    private void Start () {
        _as = GetComponent<AudioSource> ();  // get audio source
        _clipSampleData = new float[ 4410 ]; // initialize the sampleData array
    }

    private void Update () {
        if ( _as.isPlaying ) {
            currentUpdateTime += Time.deltaTime;
            if ( currentUpdateTime >= 0.1f ) {
                currentUpdateTime = 0f;

                // fills the array /w samples; 4410 samples are 100 ms on a 44.1khz stereo clip
                // beginning at the current sample position of the clip
                _as.clip.GetData ( _clipSampleData, _as.timeSamples );
                clipLoudness = 0f;
                foreach ( var sample in _clipSampleData ) {
                    clipLoudness += Mathf.Abs ( sample );
                }

                // the samples are in the range -1 to 1
                // divide by 4410 to get an average and multiply by some factor to make it brighter
                float t = clipLoudness / 4410f * 18f;
                emissiveMaterial.SetColor ( "_EmissionColor", Color.Lerp ( Color.black, emissionColor, t ) );
            }
        }
    }
}