我如何获得麦克风的当前值？

我只想在没有可视化的情况下获得麦克风的当前值。

录音应该是这样的，或者我错了？

I just want to get the current value of the microphone without the visualization.
It should be something like this from recording, or am I wrong?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [DllImport("winmm.dll")]
        private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);
        [System.Runtime.InteropServices.DllImport("winmm.dll")]
        private static extern bool mciGetErrorString(int fdwError, StringBuilder lpszErrorText, int cchErrorText);
        Timer tm1 = new Timer();
        private void button1_Click(object sender, EventArgs e)
        {
            mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
            mciSendString("set recsound CHANNELS 2", "", 0, 0);
            mciSendString("record recsound", "", 0, 0);
            tm1.Interval = 10000;
            tm1.Start();
            tm1.Tick += new EventHandler(tm1_Tick);
        }

            void tm1_Tick(object sender, EventArgs e)
            {
            string outs = "";
            int i = mciSendString(@"save recsound C:\Users\Daniel\Desktop\abcf.wav", outs, 0, 0);
            MessageBox.Show("" + i);

            StringBuilder buffer = new StringBuilder(128);
            bool returnValue = mciGetErrorString(i, buffer, buffer.Capacity);
            string err = buffer.ToString();
            MessageBox.Show(buffer.ToString());
            Close();
       }

    }
}