C#使用NAudio录音并导出录音数据

// 录音对象
WaveInEvent waveIn = new WaveInEvent();
int sampleRate = 48000;   //采样率
int channels = 2;          //录音通道数
int bitsPerSample = 16;     //位深
WaveFormat waveFormat = new WaveFormat(sampleRate, bitsPerSample, channels); 

string RecordDeviceName = "麦克风阵列"; //指定麦克风阵列录制
//枚举可用录音设备
for (int i = 0; i < WaveIn.DeviceCount; i++)
{
    var capabilities = WaveIn.GetCapabilities(i);
    Console.WriteLine("DeviceIndex:{0},ProduceName:{1}", i, capabilities.ProductName);
    if (capabilities.ProductName.StartsWith(RecordDeviceName))
    {
        Console.WriteLine("找到指定设备:{0}", RecordDeviceName);
        waveIn.DeviceNumber = i;    //设置该设备为录音设备
    }
}
waveIn.WaveFormat = waveFormat;   //设置录音格式

// 创建WaveFileWriter对象来保存录音数据  路径在bin文件下
WaveFileWriter writer = new WaveFileWriter("recorded.wav", waveFormat);
//编写器
StreamWriter mStreamWriter = new StreamWriter("Record.txt", false, new System.Text.UTF8Encoding(false));
// 设置录音回调函数
int bitIndex = bitsPerSample / 8;
waveIn.DataAvailable += (sender, e) =>
{
    // 将录音数据写入文件
    writer.Write(e.Buffer, 0, e.BytesRecorded);
 
    for (int i = 0; i < e.BytesRecorded/ bitIndex; i++)
    {
        //24bit,导出的数据
        //int sample = (int)((e.Buffer[i * bitIndex + 2] << 16) | (e.Buffer[i * bitIndex + 1] << 8) | e.Buffer[i * bitIndex]);
        //16bit  将两个byte数据组合成一个short数据
        short sample = (short)((e.Buffer[i * bitIndex + 1] << 8) | e.Buffer[i * bitIndex]);
        mStreamWriter.Write("{0},", sample);
    }               
};
try
{
    //尝试打开录音设备，如果设备支持设置的WaveFormat，则能够成功打开
    waveIn.StartRecording();              
    Console.WriteLine("开始录音");
}
catch (Exception ex)
{
    Console.WriteLine($"错误信息：{ex.Message}");
}
Console.WriteLine("请按任意键结束录音");
Console.ReadKey();
waveIn.StopRecording();  //停止录音
writer.Close(); 
mStreamWriter.Close();
waveIn.Dispose();

clear,clc,close all;   %清除工作区变量
data=load("Record.txt");  %加载录音数据
left=data(1:2:end);    %左声道数据
right=data(2:2:end);   %右声道数据
doubleChannel=[left',right']; %组合成双声道
doubleChannel=[left',right']./max(abs(doubleChannel));  %录音数据归一化
audiowrite("test.wav",doubleChannel,48000);  %以48000采样率生成wav文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NAudio.Wave;
namespace record24位
{
    class Program
    {
        static void Main(string[] args)
        {
            // 录音对象
            WaveInEvent waveIn = new WaveInEvent();
            int sampleRate = 48000;   //采样率
            int channels = 2;          //录音通道数
            int bitsPerSample = 16;     //位深
            WaveFormat waveFormat = new WaveFormat(sampleRate, bitsPerSample, channels);           
            string RecordDeviceName = "麦克风阵列";
            //枚举可用录音设备
            for (int i = 0; i < WaveIn.DeviceCount; i++)
            {
                var capabilities = WaveIn.GetCapabilities(i);
                Console.WriteLine("DeviceIndex:{0},ProduceName:{1}", i, capabilities.ProductName);
                if (capabilities.ProductName.StartsWith(RecordDeviceName))
                {
                    Console.WriteLine("找到指定设备:{0}", RecordDeviceName);
                    waveIn.DeviceNumber = i;    //设置该设备为录音设备
                }
            }
            waveIn.WaveFormat = waveFormat;   //设置录音格式
            
            // 创建WaveFileWriter对象来保存录音数据  路径在bin文件下
            WaveFileWriter writer = new WaveFileWriter("recorded.wav", waveFormat);
            //编写器
            StreamWriter mStreamWriter = new StreamWriter("Record.txt", false, new System.Text.UTF8Encoding(false));
            // 设置录音回调函数
            int bitIndex = bitsPerSample / 8;
            waveIn.DataAvailable += (sender, e) =>
            {
                // 将录音数据写入文件
                writer.Write(e.Buffer, 0, e.BytesRecorded);
 
                for (int i = 0; i < e.BytesRecorded/ bitIndex; i++)
                {
                    //24bit,导出的数据
                    //int sample = (int)((e.Buffer[i * bitIndex + 2] << 16) | (e.Buffer[i * bitIndex + 1] << 8) | e.Buffer[i * bitIndex]);
                    //16bit  将两个byte数据组合成一个short数据
                    short sample = (short)((e.Buffer[i * bitIndex + 1] << 8) | e.Buffer[i * bitIndex]);
                    mStreamWriter.Write("{0},", sample);
                }               
            };
            try
            {
                //尝试打开录音设备，如果设备支持设置的WaveFormat，则能够成功打开
                waveIn.StartRecording();              
                Console.WriteLine("开始录音");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"错误信息：{ex.Message}");
            }
            Console.WriteLine("请按任意键结束录音");
            Console.ReadKey();
            waveIn.StopRecording();  //停止录音
            writer.Close(); 
            mStreamWriter.Close();
            waveIn.Dispose();
 
        }
    }
}