在控制台应用程序中使用NAudio录制麦克风音频

Question

我的代码运行并创建了一个test.wav，但是这个文件不包含任何内容。我正在尝试在控制台应用程序中运行此代码。请帮助

        using System;
        using System.Media;
        using NAudio;
        using NAudio.Wave;
        class sound
        {
            public static void Main()
            {
                WaveInCapabilities deviceInfo = WaveIn.GetCapabilities(0);
                Console.WriteLine("Now recording...");
                WaveInEvent waveSource = new WaveInEvent();
                waveSource.DeviceNumber = 0;
                waveSource.WaveFormat = new WaveFormat(16000, deviceInfo.Channels);
                //waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable);
                string tempFile = (@"C:UsersuserDesktoptest1.wav");
                WaveFileWriter waveFile = new WaveFileWriter(tempFile, waveSource.WaveFormat);
                waveSource.StartRecording();
            }
            //void waveInStream_DataAvailable(object sender, WaveInEventArgs e)
            //{
            //    wavefile.WriteData(e.Buffer, 0, e.BytesRecorded);
            //}
        }

，谁能解释一下被注释的行是什么意思?我是一个编程初学者。

当我编译程序时，它给出了2个错误:错误1:非静态字段、方法或属性需要对象引用。waveSource_DataAvailable(object, NAudio.Wave.WaveInEventArgs)' C:UsersuserDocumentsVisual Studio 2008ProjectssoundsoundProgram.cs 18 49 sound

错误2"wavefile"名称在当前上下文中不存在C:UsersuserDocumentsVisual Studio 2008ProjectssoundsoundProgram.cs 28 21 sound

Answer 1

显然，StartRecording方法启动一些捕获循环，周期性地引发DataAvailable事件，以允许用户收集记录的数据。在您的示例代码中，事件句柄正确地将记录的数据附加到文件tempFile。函数waveInStream_DataAvailable和waveFile都必须声明为静态。

Answer 2

试试这个:

using System;
using System.Media;
using NAudio;
using NAudio.Wave;
class sound
    {
        static WaveFileWriter waveFile;
        public static void Main()
        {
            //WaveInCapabilities deviceInfo = WaveIn.GetCapabilities(0);
            Console.WriteLine("Now recording...");
            WaveInEvent waveSource = new WaveInEvent();
            //waveSource.DeviceNumber = 0;
            waveSource.WaveFormat = new WaveFormat(44100, 1);
            waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable);
            string tempFile = (@"C:UsersuserDesktoptest1.wav");
            waveFile = new WaveFileWriter(tempFile, waveSource.WaveFormat);
            waveSource.StartRecording();
            Console.WriteLine("Press enter to stop");
            Console.ReadLine();
            waveSource.StopRecording();
            waveFile.Dispose();
        }
        static void waveSource_DataAvailable(object sender, WaveInEventArgs e)
        {
            waveFile.WriteData(e.Buffer, 0, e.BytesRecorded);
        }
    }