NAudio音量變化

class Sound 
{ 

    private NAudio.Wave.BlockAlignReductionStream stream = null; 
    private NAudio.Wave.DirectSoundOut output = null; 
    private string fileName; 

    public Sound(string fileName) 
    { 

     this.fileName = fileName; 

    } 
    public void PlaySound() 
    { 

     if(fileName.EndsWith(".mp3")) 
     { 
     NAudio.Wave.WaveStream pcm = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(fileName)); 
     stream = new NAudio.Wave.BlockAlignReductionStream(pcm); 

     } 
     else if (fileName.EndsWith(".wav")) 
     { 
      NAudio.Wave.WaveStream pcm = new NAudio.Wave.WaveChannel32(new NAudio.Wave.WaveFileReader(fileName)); 
      stream = new NAudio.Wave.BlockAlignReductionStream(pcm); 
     } 
     else throw new InvalidOperationException("Not a correct audio file type."); 

     output = new NAudio.Wave.DirectSoundOut(); 
     output.Init(stream); 
     output.Play(); 
     output.Volume = 0.5f; 
    } 
    public void Volume(float vol) 
    { 

    } 
    public void PausePlay() 
    { 
     if (output != null) 
     { 
      if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Pause(); 
      else if (output.PlaybackState == NAudio.Wave.PlaybackState.Paused) output.Play(); 
     } 
    } 
    public void Pause() 
    { 
     if (output != null) 
     { 
      if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Pause(); 
     } 
    } 
    public void Play() 
    { 
     if (output != null) 
     { 
      if (output.PlaybackState == NAudio.Wave.PlaybackState.Paused) output.Play(); 
     } 
    } 
    public void DisposeWave() 
    { 
     if (output != null) 
     { 
      if (output.PlaybackState == NAudio.Wave.PlaybackState.Playing) output.Stop(); 
      output.Dispose(); 
      output = null; 
     } 
     if (stream != null) 
     { 
      stream.Dispose(); 
      stream = null; 
     } 
    } 
    public bool Over() 
    { 
     if (stream.Position == stream.Length) 
      return true; 
     return false; 
    } 
    public void Loop() 
    { 

     if (Over()) 
     { 
      stream.Position = 0; 
      output.Play(); 

     } 

    }

我真的不知道這裏有什麼問題，我很樂意提供幫助，我試圖改變輸出音頻的音量。當我編譯此代碼時，我在output.volume = 0.5中收到錯誤。錯誤是：NAudio音量變化

DirectSoundOut不支持設置音量，而是調整WaveProvider上的音量。

來源

2012-01-20 user1139211

+1對於'新NAudio.Wave.WaveChannel32（新NAudio.Wave.WaveFileReader（fileName））'技巧，它幫助我在使用Mp3FileReader（不包含此屬性本身）時訪問'Volume'屬性。 – Sam

這意味着，請使用WaveChannel32上的Volume屬性代替。此外，除非您使用舊版本的NAudio，否則BlockAlignReductionStream和WaveFormatConversion數據流是不必要的，因爲MP3FileReader會發出PCM。

來源

2012-01-21 08:25:39

NAudio音量變化

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