[Unity] Make a loop sound from non-loop one

We released AmbientLooper on Unity Asset store.
This asset will generate a loop .wav file or clip from non-loop one.

Following script is a part of this asset.
attach this script in a object that contains AudioSource,
a clip in the AudioSource becomes loop clip.
Movie

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

[RequireComponent(typeof(AudioSource))]
public class CrossFadeLoop : MonoBehaviour
{
    [Tooltip("cross fade dulation[sec]"), Range(0.1f, 5f)] public float m_crossFadeTime = 1f;

    void Start()
    {
        AudioSource audioSrc = gameObject.GetComponent<AudioSource>();
        AudioClip ac = audioSrc.clip;
        float[] data = new float[ac.samples * ac.channels];
        ac.GetData(data, 0);
        int span = Mathf.FloorToInt(m_crossFadeTime * (float)(ac.frequency * ac.channels));
        span -= (span % ac.channels);
        float[] newData = CrossFade(data, span);
        AudioClip newAc = AudioClip.Create("_loop_" + ac.name, newData.Length / ac.channels, ac.channels, ac.frequency, false);
        newAc.SetData(newData, 0);
        audioSrc.clip = newAc;
        if (audioSrc.playOnAwake)
            audioSrc.Play();
    }

    static public float[] CrossFade(float[] data, int span)
    {
        if (data.Length < span * 2)
            return data;

        float[] retData = new float[data.Length - span];
        for (int i = 0; i < span; ++i)
        {
            float rate = (float)(i + 1) / (float)(span + 1);
            retData[i] = data[i] * rate + data[data.Length - span + i] * (1f - rate);
        }
        for (int i = span; i < data.Length - span; ++i)
            retData[i] = data[i];

        return retData;
    }
}