嘗試從數組中讀取時出錯

Question

我正在嘗試使用C＃控制檯應用程序發出嘟嘟聲。是的，我知道我可以使用Console.Beep，但我也想降低音量等

但我得到的錯誤是這樣的：

方法名稱預計

在這條線：

binaryWriter.Write(hdr(i)); 

這是我的代碼：

private bool Beep(int volume, int frequency, int duration) 
{ 
    try 
    { 
     double amplitude = volume * 1.27; 
     double a = ((amplitude * (System.Math.Pow(2, 15)))/1000) - 1; 
     double deltaFt = 2 * System.Math.PI * frequency/8000; 

     double samples = 441 * (duration/100); 
     int bytes = Convert.ToInt32(samples) * 4; 
     int[] hdr = { 
    0x46464952, 
    36 + bytes, 
    0x45564157, 
    0x20746d66, 
    16, 
    0x20001, 
    8000, 
    176400, 
    0x100004, 
    0x61746164, 
    bytes 
}; 
     using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(44 + bytes)) 
     { 
      using (System.IO.BinaryWriter binaryWriter = new System.IO.BinaryWriter(memoryStream)) 
      { 
       for (int i = 0; i <= hdr.Length - 1; i++) 
       { 
        binaryWriter.Write(hdr(i)); 
       } 
       for (int T = 0; T <= Convert.ToInt32(samples) - 1; T++) 
       { 
        short sample = Convert.ToInt16(a * System.Math.Sin(deltaFt * T)); 
        binaryWriter.Write(sample); 
        binaryWriter.Write(sample); 
       } 
       binaryWriter.Flush(); 
       memoryStream.Seek(0, System.IO.SeekOrigin.Begin); 
       using (System.Media.SoundPlayer sp = new System.Media.SoundPlayer(memoryStream)) 
       { 
        sp.PlaySync(); 
       } 
      } 
     } 
    } 
    catch 
    { 
     return false; 
    } 
    return true; 
} 

Answer 1

你的HDR是一個數組，你需要把方括號，然後使指數

binaryWriter.Write(hdr[i]);