本实例通过Naudio库完成麦克风录音并把PCM脉冲信号保存成wav音频文件。关于音频的采样率、比特率、声道等问题请查阅相关资料，本示例不做解释。Naudio库 请从NuGet搜索并下载。
录音接口类：
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public interface ISpeechRecorder { void SetFileName(string fileName); void StartRec(); void StopRec(); } |
录音实现类：
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using System;using NAudio.Wave;namespace Test{ class NAudioRecorder : ISpeechRecorder { public WaveIn waveSource = null; public WaveFileWriter waveFile = null; private string fileName = string.Empty; /// <summary> /// 第二步：开始录音 /// </summary> public void StartRec() { try { waveSource = new WaveIn();//保证电脑有麦克接入否则报错。 waveSource.WaveFormat = new WaveFormat(16000, 16, 1); // 16KHz，16bit,单声道的录音格式 waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable); waveSource.RecordingStopped += new EventHandler<StoppedEventArgs>(waveSource_RecordingStopped); waveFile = new WaveFileWriter(fileName, waveSource.WaveFormat); waveSource.StartRecording(); } catch(Exception e) { throw new Exception(e.Message); } } /// <summary> /// 第三步：停止录音 /// </summary> public void StopRec() { waveSource.StopRecording(); // Close Wave(Not needed under synchronous situation) if (waveSource != null) { waveSource.Dispose(); waveSource = null; } if (waveFile != null) { waveFile.Dispose(); waveFile = null; } } /// <summary> /// 第一步：设置录音结束后保存的文件路径 /// </summary> /// <param name="fileName">保存wav文件的路径名</param> public void SetFileName(string fileName) { this.fileName = fileName; } /// <summary> /// 开始录音回调函数 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void waveSource_DataAvailable(object sender, WaveInEventArgs e) { if (waveFile != null) { waveFile.Write(e.Buffer, 0, e.BytesRecorded); waveFile.Flush(); } } /// <summary> /// 录音结束回调函数 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void waveSource_RecordingStopped(object sender, StoppedEventArgs e) { if (waveSource != null) { waveSource.Dispose(); waveSource = null; } if (waveFile != null) { waveFile.Dispose(); waveFile = null; } } }} |
调用方法：
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NAudioRecorder nar=new NAudioRecorder();nar.SetFileName(@"d:\naudio.wav");nar.StartRec();nar.StopRec(); |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/yx1234321/article/details/106250268
