유니티 오디오 관련 코드

public static void WaveToMP3(string waveFileName, string mp3FileName, NAudio.Lame.LAMEPreset bitRate = NAudio.Lame.LAMEPreset.ABR_128)
{
    using (var reader = new NAudio.Wave.WZT.WaveFileReader(waveFileName))
    using (var writer = new NAudio.Lame.LameMP3FileWriter(mp3FileName, new NAudio.Wave.WZT.WaveFormat(), bitRate))
        reader.CopyTo(writer);
}
public void SaveMp3(string filePath,AudioClip clip)
{
    if (clip == null)
    {
        Debug.LogError("클립없음");
        return;
    }
    var tempPath = Application.temporaryCachePath + "/tempAudio";
    //Debug.Log(tempPath);
    SavWav.Save(tempPath, clip);
    //Debug.Log(filePath);
    WaveToMP3(tempPath, filePath);
    System.IO.File.Delete(tempPath);
}

 

볼륨 프로토 타입

    float GetVolume(float[] audioData, int index, int samplingRate)
    {
        if ((audioData == null) || (audioData.Length == 0))
        {
            return 0;
        }
        float checkTime = 0.05f;

        var startIndex = index;
        var length = Mathf.Min(audioData.Length - index, (int)(samplingRate * checkTime));
        var sliceArray = audioData.Skip(startIndex).Take(length).ToArray();
        //return System.Array.ConvertAll(sliceArray, x => Mathf.Abs(x)).Average();
        if ((sliceArray == null) || (sliceArray.Length == 0))
        {
            return 0;
        }
        return sliceArray.Max();
    }

 

 

 

 

 

 

 

현재 오디오소스의 볼륨을 가져옴

    public AudioSource audioSource;

    float GetVolume(float[] audioData, int index, int samplingRate)
    {
        if ((audioData == null) || (audioData.Length == 0))
        {
            return 0;
        }
        float checkTime = 0.05f;

        var startIndex = index;
        var length = Mathf.Min(audioData.Length - index, (int)(samplingRate * checkTime));
        var sliceArray = audioData.Skip(startIndex).Take(length).ToArray();
        //return System.Array.ConvertAll(sliceArray, x => Mathf.Abs(x)).Average();
        if ((sliceArray == null) || (sliceArray.Length == 0))
        {
            return 0;
        }
        return sliceArray.Max();
    }
    // Update is called once per frame
    void Update()
    {

        var clip = audioSource.clip;
        var ratio = audioSource.time / clip.length;
        var samplingRate = clip.frequency;
        int index = (int)(clip.samples * ratio / clip.channels);
        float[] audioData = new float[clip.samples * clip.channels];
        audioSource.clip.GetData(audioData, 0);
        float volume = GetVolume(audioData, index, samplingRate);
        //float volume2 = audioData[index] - audioData[Mathf.Max(0, index - 1)];


        var localScale = transform.localScale;
        localScale.x= volume;
        transform.localScale = localScale;
    }

 

wav로 저장

https://gist.github.com/darktable/2317063

var savePath = SFB.StandaloneFileBrowser.SaveFilePanel("Save File",directory:"", "defaultName", ".wav"); 
if (savePath == null)
{
    return;
}
SavWav.Save(savePath, clip);

 

 

mp3로 저장 (Unity3D-save-audioClip-to-MP3)

https://github.com/BeatUpir/Unity3D-save-audioClip-to-MP3

var savePath = SFB.StandaloneFileBrowser.SaveFilePanel("Save File",directory:"", "defaultName", ".mp3"); 
if (savePath == null)
{
    return;
}
EncodeMP3.convert(clip, savePath, bitRate: 128);

 

mp3로 저장 (Lame-For-Unity)

위에거보단 느리고 불안정

조심할점은 위의 Unity3D-save-audioClip-to-MP3와 충돌한다는 점이다

https://github.com/3wz/Lame-For-Unity

public static void WaveToMP3(string waveFileName, string mp3FileName, NAudio.Lame.LAMEPreset bitRate = NAudio.Lame.LAMEPreset.ABR_128)
{
    using (var reader = new NAudio.Wave.WZT.WaveFileReader(waveFileName))
    using (var writer = new NAudio.Lame.LameMP3FileWriter(mp3FileName, new NAudio.Wave.WZT.WaveFormat(), bitRate))
        reader.CopyTo(writer);
}
public void SaveMp3(string filePath,AudioClip clip)
{
    if (clip == null)
    {
        Debug.LogError("클립없음");
        return;
    }
    var tempPath = Application.temporaryCachePath + $"/tempAudio.wav";
    //Debug.Log(tempPath);
    SavWav.Save(tempPath, clip);
    //Debug.Log(filePath);
    WaveToMP3(tempPath, filePath);
    System.IO.File.Delete(tempPath);
}

 

 

 

윈도우에서 mp3로드

https://assetstore.unity.com/packages/tools/audio/audioimporter-146746