在运行时在 Unity 中加载 MP3 文件

我正在尝试使用 Unity 中提供的 WWW 类在运行时加载 mp3 文件。

我没有收到任何错误，但是在处理完歌曲后，我无法播放音乐。我到处找过，找不到任何可以帮助我的东西。

这是我目前使用的代码：

public class OpenFile : MonoBehaviour {
    string path;
    string extension;
    public GameObject musicAnalysis;
    string songName;
    float length;
    AudioSource song;
    // Use this for initialization
    void Start () {
        song =  musicAnalysis.GetComponent<AudioSource>();
    }
    // Update is called once per frame
    void Update () {
        if(song.isPlaying != true){
            song.Play();
        }
    }
    public void FileSelect(){
        //Open windows Exploer 
        path = EditorUtility.OpenFilePanel("Select a Song","","");
        print(path);
        //Take the end of the the path and sasve it to another string
        extension = path.Substring(path.IndexOf('.') + 1);
        print (extension);
        //Check if the user has select the correct file
        if(extension == "mp3" || extension == "wav" || extension == "ogg"){
            //if correct file process file
            print ("You have selected the correct file type congrats");
            LoadSong();
            print ("Song Name: " + songName);
            print ("Song Length: " + length);
        }
        //if the user selects the wrong file type
        else{
            //pop up box that tells the user that they have selected the wrong file
            EditorUtility.DisplayDialog("Error","Incorrect File Type Please select another","Ok");
            ////Open windows Exploer 
            path = EditorUtility.OpenFilePanel("Select a Song","","");
        }
    }
    void LoadSong(){
        WWW www = new WWW("file://" + path);
        song.clip = www.audioClip;
        songName =  www.audioClip.name;
        length = www.audioClip.length;
        while(!www.isDone){
            print ("Processing File" + path);
        }
        if(www.isDone == true){
            print ("Song has been processed");
        }
    }
}

public void LoadSong()
{
    StartCoroutine(LoadSongCoroutine());    
}
IEnumerator LoadSongCoroutine()
{
    string url = string.Format("file://{0}", path); 
    WWW www = new WWW(url);
    yield return www;
    song.clip = www.GetAudioClip(false, false);
    songName =  song.clip.name;
    length = song.clip.length;
}

IEnumerator LoadHelper(string uri)
{
    UnityWebRequest www = UnityWebRequest.Get(uri);
    yield return www.SendWebRequest();
    if(www.isNetworkError || www.isHttpError)
    {
        Debug.Log(www.error);
    }
    else
    {
      // Or retrieve results as binary data
      byte[] results = www.downloadHandler.data;
      var memStream = new System.IO.MemoryStream(results);
      var mpgFile = new NLayer.MpegFile(memStream);
      var samples = new float[mpgFile.Length];
      mpgFile.ReadSamples(samples, 0, (int)mpgFile.Length);
      var clip = AudioClip.Create("foo", samples.Length, mpgFile.Channels, mpgFile.SampleRate, false);
      clip.SetData(samples, 0);
      source.clip = clip;
    }
}