我的DirectX聲音緩衝器具有靜態噪聲

所以我喜歡工作在大學分配（保留一些我的技能銳利）和我決定來解決這一之一：我的DirectX聲音緩衝器具有靜態噪聲

http://introcs.cs.princeton.edu/java/assignments/dsp.html

我跑MSVS2015 C＃/ Console應用程序以及SharpDX包，使我可以訪問一些底層DirectSound功能。我只是想在第一個例子中創建並播放2秒鐘的音符'A'。當我運行下面的代碼時，它會播放2秒，但它非常靜態-y。我假設我的計算有些問題，但我無法弄清楚究竟是什麼。有沒有人有經驗編寫自己的數字聲音緩衝區？

謝謝， - 傑夫

public class Execution : IDisposable 
{ 
    IntPtr Handle; 
    DirectSound Device; 
    SecondarySoundBuffer Buffer; 
  
    public Execution() 
    { 
     Handle = System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle; 
  
     Device = new DirectSound(); 
     Device.SetCooperativeLevel(Handle, CooperativeLevel.Priority); 
  
     var rate = 44100; 
     var bits = 16; 
     var channels = 1; 
     var waveFormat = new WaveFormat(rate, bits, channels); 
  
     // Create a buffer with 2 seconds of sample data 
     var seconds = 2; 
  
     var bufferDescription = new SoundBufferDescription() { Format = waveFormat, BufferBytes = waveFormat.AverageBytesPerSecond * seconds }; 
     Buffer = new SecondarySoundBuffer(Device, bufferDescription); 
  
     var noteFrequency = 440f;  // A 
     var bufferData = new float[bufferDescription.BufferBytes]; 
  
     var count = 0; 
     for (var sample = 0; sample < bufferDescription.BufferBytes; sample++) 
     { 
      var sampleInSeconds = (float)sample/(float)bufferDescription.BufferBytes * (float)seconds; 
      var value = (float)Math.Sin(2f * Math.PI * noteFrequency * sampleInSeconds); 
      bufferData[sample] = value; 
     } 
  
     Buffer.Write(bufferData, 0, LockFlags.EntireBuffer); 
    } 
  
    public void Execute() 
    { 
     Buffer.Play(0, 0); 
    } 
  
    public void Dispose() 
    { 
     Buffer.Dispose(); 
     Device.Dispose(); 
    } 
}

來源

2016-12-01 Jeffrey

由於var bits = 16;的預期值應該是一個短的（-32768，32767），所以簡單地替換bufferData到new short[bufferDescription.BufferBytes];和最終計算bufferData[sample] = (short)(value * short.MaxValue);應該有希望解決該噪音

來源

2016-12-02 17:02:55 xoofx

我的DirectX聲音緩衝器具有靜態噪聲

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