C# Naudio 从麦克风输入到声卡输出 录音 放音功能

1.using NAudio.Wave;从麦克风输入到声卡输出，并操作数据

//创建输出对象
WaveOut waveOut = new WaveOut();
//创建输入对象
WaveIn waveIn = new WaveIn();
//创建缓冲区
BufferedWaveProvider bufferedWaveProvider = new BufferedWaveProvider(new WaveFormat(16000, 16, 1));
public void PlaySound() {
//输入音频参数设置 16k/16位/通道1
waveIn.WaveFormat = new WaveFormat(16000, 16, 1);
//为wavein的回调函数添加事件，用于操作数据
waveIn.DataAvailable += new EventHandler<WaveInEventArgs>(waveIn_DataAvailable);
//播放
waveOut.Init(bufferedWaveProvider);
waveOut.Play();
}
/// <summary>
/// 回调函数
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void waveIn_DataAvailable(object sender, WaveInEventArgs e)
{
//e.Buffer为用于操作的数组，类型为byte
bufferedWaveProvider.AddSamples(e.Buffer,0,e.BytesRecorded);
byte[] WaveIn_Data = e.Buffer;
}
2.利用Naudio录音，如对wav文件的头不了解请访问wav头文件格式

//新建文件操作对象,System.Windows.Forms.Application.StartupPath为程序bin目录 wave为文件夹名称 格式为wav
WaveFileWriter waveFileWriter = new WaveFileWriter(System.Windows.Forms.Application.StartupPath + "\wave\.wav", new WaveFormat(16000, 16, 1));
private void waveIn_DataAvailable(object sender, WaveInEventArgs e)
{
//e.Buffer为用于操作的数组，类型为byte
bufferedWaveProvider.AddSamples(e.Buffer, 0, e.BytesRecorded);
byte[] WaveIn_Data = e.Buffer;
waveFileWriter.Write(WaveIn_Data, 0, WaveIn_Data.Length);
}
//先写入头文件，如对wav文件的头不了解请访问
public void CreateWav() {
byte[] bxt = new byte[44] { 82, 73, 70, 70, 36, 124, 7, 0, 87, 65, 86, 69, 102, 109, 116, 32, 16, 0, 0, 0, 1, 0, 1, 0, 64, 31, 0, 0, 128, 62, 0, 0, 2, 0, 16, 0, 100, 97, 116, 97, 0, 124, 7, 0 };
waveFileWriter.Write(bxt, 0, bxt.Length);
}
//停止录音
private void stopMsg_Click(object sender, EventArgs e)
{
waveFileWriter.Close();
}

3.播放文件

//播放
private void PlayWav_Click(object sender, EventArgs e)
{
//文件打开对象
OpenFileDialog dialog = new OpenFileDialog();
//设置格式
dialog.Filter = "Wave File (*.wav)|*.wav;";
//默认路径
dialog.InitialDirectory = System.Windows.Forms.Application.StartupPath + "\wave\";
//是否选取文件
if (dialog.ShowDialog() == DialogResult.OK)
{
//文件访问对象
AudioFileReader waveReader = new AudioFileReader(dialog.FileName);
WaveOut waveOutPlay=new WaveOut();
waveOutPlay.Init(waveReader);
// 设置音量 0~1
waveOutPlay.Volume = 1f;
waveOutPlay.Play();
}
}

如需要获取播放状态，可以新建线程或定时器监听状态

if (waveOutPlay.PlaybackState != PlaybackState.Playing) { }