我的directx声音缓冲区有静电噪声。请帮忙。

问题描述

所以我喜欢从事大学任务（保持我的一些技能），我决定解决这个问题：



[]



我正在运行MSVS2015 C＃/ Console应用程序以及SharpDX软件包，这使我可以访问一些基础DirectSound功能。我只是想在第一个例子中创建并播放2秒音符'A'。当我运行以下代码时，它会播放2秒，但它非常静态。我假设我的计算中有一些东西，但我无法弄清楚到底是什么。有没有人有写自己的数字声音缓冲区的经验？



谢谢，

- 杰夫



我尝试过：

So I enjoy working on college assignments (to keep some of my skills sharp) and I've decided to tackle this one:

COS 126 Programming Assignment: Digital Signal Processing Assignment[^]

I'm running MSVS2015 C#/Console app along with the SharpDX package that gives me access to some underlying DirectSound capabilities. I'm just trying to create and play a 2 second note 'A' as they go over in the first example. When I run the following code it plays the 2 seconds but it is very static-y. I'm assuming there is something off with my calculations but I can't figure out what exactly. Does anyone have experience writing their own digital sound buffers?

Thanks,
- Jeff

What I have tried:

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();
	}
}

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