16块柱状Unity音频可视化

16块的音频可视化，参考了https://blog.csdn.net/noEnoughChief/article/details/82984635
效果：

第一种：

1. 挂在长方形上，调节band从1到15。band0和16值为零。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(AudioSource))]
public class AudioVisable : MonoBehaviour {
    AudioSource audioSource;
    float[] samples = new float[1024];//每个采样约20Hz
    public static float[] freqBand = new float[16];
    int[] sampleCount = {1,2,4,8,10,12,15,17,20,22,25,27,30,70,100,250,500,1000};//区块之间的分割数
    public static float[] bandBuffer = new float[16];//缓冲区以减缓过于跳跃的变化
    float[] bufferDecrease = new float[16];//柱子的下降速度
    float[] freqBandHighest = new float[16];
    public static float[] audioBandBuffer = new float[16];
	void Start () {
        audioSource = GetComponent<AudioSource>();
	}
    void CreateAudioBands()
    {
        for (int i = 0; i < 16; i++)
        {
            if (freqBand[i] > freqBandHighest[i])
            {
                freqBandHighest[i] = freqBand[i];
            }
            audioBandBuffer[i] = (bandBuffer[i]/freqBandHighest[i]);
        }
    }
	void Update () {
        GetSpectrumAduioSource();
        MakeFrequencyBands();
        Buffer();
        CreateAudioBands();
        Debug.Log(freqBand[14]);
    }

    void GetSpectrumAduioSource()
    {
        audioSource.GetSpectrumData(samples, 0, FFTWindow.Hanning);
    }
    void Buffer()
    {   
        for (int g = 0; g < 16; g++)
        {
            if (freqBand[g] > bandBuffer[g])//升高：高于缓冲器中的高度时
            {
                bandBuffer[g] = freqBand[g];
                bufferDecrease[g] = 0.005f;
                
            }
            if (freqBand[g] < bandBuffer[g])//低于：低于缓冲器中的高度时
            {
                 bandBuffer[g] -= bufferDecrease[g];
                 bufferDecrease[g] *= 1.2f;//每一帧以0.005f * 1.2f 的速度下降
            }
        }
    }
        void MakeFrequencyBands()
    {
        int count = 0;
        for (int i = 0; i < 16; i++)//16个块划分
        {
            float average = 0;  //每计算一个band清空一次average
            for (int j = 0; j < sampleCount[i]; j++)
            {
                // average += samples[count]*(count+1);
                average += samples[count]*count;
                count++;
            }
            average /= count;
            freqBand[i] = average * 10;
        }
    }
}

2. 挂在长方形上，调节band从1到15。band0和16值为零。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ParamCube : MonoBehaviour {

    public int band;
    public float StartScale, MaxScale;


	void Start () {
        // material = GetComponent().materials[0];
	}
	
	// Update is called once per frame
	void Update () 
    {
        transform.localScale = new Vector3(transform.localScale.x, (AudioVisable.freqBand[band]) * MaxScale + StartScale, transform.localScale.z);  
    }
}

第二种：波动随声音变化明显
由于Buffer函数的存在，在Android上显示效果不好，波动不明显。故进行了修改，在ParamCube里又添加了MaxHeight控制长方形的最大高度。

1. 挂在长方形上，调节band从1到15。band0和16值为零。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(AudioSource))]
public class AudioVisable : MonoBehaviour {
    AudioSource audioSource;
    float[] samples = new float[1024];//每个采样约20Hz
    public static float[] freqBand = new float[16];
    int[] sampleCount = {1,2,4,8,10,12,15,17,20,22,25,27,30,70,100,250,500,1000};//区块之间的分割数
    public static float[] bandBuffer = new float[16];//缓冲区以减缓过于跳跃的变化
    float[] bufferDecrease = new float[16];//柱子的下降速度
    float[] freqBandHighest = new float[16];
    public static float[] audioBandBuffer = new float[16];
	void Start () {
        audioSource = GetComponent<AudioSource>();
	}
    void CreateAudioBands()
    {
        for (int i = 0; i < 16; i++)
        {
            if (freqBand[i] > freqBandHighest[i])
            {
                freqBandHighest[i] = freqBand[i];
            }
            audioBandBuffer[i] = (bandBuffer[i]/freqBandHighest[i]);
        }
    }
	void Update () {
        GetSpectrumAduioSource();
        MakeFrequencyBands();
        Buffer();
        CreateAudioBands();
        Debug.Log(freqBand[14]);
    }

    void GetSpectrumAduioSource()
    {
        audioSource.GetSpectrumData(samples, 0, FFTWindow.Hanning);
    }
    void Buffer()//在安卓上效果不好
    {   
        for (int g = 0; g < 16; g++)
        {
            if (freqBand[g] > bandBuffer[g])//升高：高于缓冲器中的高度时
            {
                bandBuffer[g] = freqBand[g];
                // bufferDecrease[g] = 0.005f;
                
            }
            // if (freqBand[g] < bandBuffer[g])//低于：低于缓冲器中的高度时
            // {
            //     bandBuffer[g] -= bufferDecrease[g];
            //     bufferDecrease[g] *= 1.2f;//每一帧以0.005f * 1.2f 的速度下降
            // }
        }
    }
        void MakeFrequencyBands()
    {
        int count = 0;
        for (int i = 0; i < 16; i++)//16个块划分
        {
            float average = 0;  //每计算一个band清空一次average
            for (int j = 0; j < sampleCount[i]; j++)
            {
                // average += samples[count]*(count+1);
                average += samples[count]*count;
                count++;
            }
            average /= count;
            freqBand[i] = average * 10;
        }
    }
}

2. 挂在长方形上，调节band从1到15。band0和16值为零。

    using System.Collections;
	using System.Collections.Generic;
	using UnityEngine;

	public class ParamCube : MonoBehaviour {
    public int band;
    public float StartScale, MaxScale;
    public float MaxHeight;


	void Start () {
        // material = GetComponent().materials[0];
	}
	
	// Update is called once per frame
	void Update () 
    {
        if(AudioVisable.freqBand[band] > MaxHeight)
        {
            AudioVisable.freqBand[band] = MaxHeight;
        }
            transform.localScale = new Vector3(transform.localScale.x, (AudioVisable.freqBand[band]) * MaxScale + StartScale, transform.localScale.z);  
    }
}

大家可以比较使用。